/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:38:18,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:38:18,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:38:18,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:38:18,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:38:18,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:38:18,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:38:18,323 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 16:38:18,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:38:18,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:38:18,341 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:38:18,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:38:18,342 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:38:18,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:38:18,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:38:18,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:38:18,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:38:18,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:38:18,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:38:18,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:38:18,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:38:18,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:38:18,344 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:38:18,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:38:18,344 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:38:18,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:38:18,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:38:18,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:38:18,650 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:38:18,651 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:38:18,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl [2021-05-03 16:38:18,652 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array.wvr.bpl' [2021-05-03 16:38:18,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:38:18,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:38:18,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:38:18,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:38:18,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:38:18,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:38:18,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:38:18,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:38:18,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:38:18,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/1) ... [2021-05-03 16:38:18,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:38:18,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:38:18,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:38:18,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:38:18,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (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 16:38:18,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:38:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:38:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:38:18,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:38:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:38:18,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:38:18,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:38:18,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:38:18,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:38:18,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:38:18,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:38:18,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:38:18,817 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 16:38:18,996 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:38:18,996 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:38:18,997 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:38:18 BoogieIcfgContainer [2021-05-03 16:38:18,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:38:18,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:38:18,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:38:19,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:38:19,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:38:18" (1/2) ... [2021-05-03 16:38:19,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a7172d and model type max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:38:19, skipping insertion in model container [2021-05-03 16:38:19,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:38:18" (2/2) ... [2021-05-03 16:38:19,016 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array.wvr.bpl [2021-05-03 16:38:19,020 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:38:19,020 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:38:19,022 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:38:19,023 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:38:19,067 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:38:19,090 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:38:19,104 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:38:19,104 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:38:19,104 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:38:19,104 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:38:19,105 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:38:19,105 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:38:19,105 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:38:19,105 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:38:19,110 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-05-03 16:38:19,127 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 16:38:19,130 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 16:38:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:38:19,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:19,139 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 16:38:19,139 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:19,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -520695315, now seen corresponding path program 1 times [2021-05-03 16:38:19,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:19,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976524628] [2021-05-03 16:38:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:19,250 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 16:38:19,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976524628] [2021-05-03 16:38:19,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:38:19,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:38:19,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26641121] [2021-05-03 16:38:19,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:38:19,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:19,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:38:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:38:19,266 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 16:38:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:19,290 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-05-03 16:38:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:38:19,291 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 16:38:19,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:19,298 INFO L225 Difference]: With dead ends: 217 [2021-05-03 16:38:19,298 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 16:38:19,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:38:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 16:38:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-05-03 16:38:19,366 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 16:38:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-05-03 16:38:19,369 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-05-03 16:38:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:19,370 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-05-03 16:38:19,370 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 16:38:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-05-03 16:38:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:38:19,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:19,372 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 16:38:19,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:38:19,372 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-05-03 16:38:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:19,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581131161] [2021-05-03 16:38:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:19,434 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 16:38:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581131161] [2021-05-03 16:38:19,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:38:19,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:38:19,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616961474] [2021-05-03 16:38:19,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:38:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:38:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:38:19,437 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 16:38:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:19,473 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-05-03 16:38:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:38:19,474 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 16:38:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:19,476 INFO L225 Difference]: With dead ends: 158 [2021-05-03 16:38:19,476 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 16:38:19,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:38:19,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 16:38:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-05-03 16:38:19,484 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 16:38:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-05-03 16:38:19,486 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-05-03 16:38:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:19,486 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-05-03 16:38:19,486 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 16:38:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-05-03 16:38:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:38:19,488 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:19,488 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 16:38:19,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:38:19,488 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:19,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1197401099, now seen corresponding path program 1 times [2021-05-03 16:38:19,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:19,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742858900] [2021-05-03 16:38:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:19,529 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 16:38:19,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742858900] [2021-05-03 16:38:19,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:38:19,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:38:19,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812122760] [2021-05-03 16:38:19,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:38:19,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:38:19,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:38:19,532 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 16:38:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:19,568 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-05-03 16:38:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:38:19,568 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 16:38:19,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:19,570 INFO L225 Difference]: With dead ends: 183 [2021-05-03 16:38:19,570 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 16:38:19,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:38:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 16:38:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-05-03 16:38:19,579 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 16:38:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-05-03 16:38:19,580 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-05-03 16:38:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:19,580 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-05-03 16:38:19,580 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 16:38:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-05-03 16:38:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:38:19,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:19,582 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 16:38:19,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:38:19,582 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-05-03 16:38:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:19,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581133821] [2021-05-03 16:38:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:19,880 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 16:38:19,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581133821] [2021-05-03 16:38:19,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146252267] [2021-05-03 16:38:19,880 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 16:38:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:19,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:38:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:20,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:20,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:20,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:38:20,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:20,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:20,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:20,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2021-05-03 16:38:20,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:20,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:20,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:38:20,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:20,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:20,353 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 16:38:20,354 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:85, output treesize:15 [2021-05-03 16:38:20,385 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 16:38:20,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:20,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676656928] [2021-05-03 16:38:20,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:20,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:20,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:20,387 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:20,612 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-05-03 16:38:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:38:20,613 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 16:38:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:20,614 INFO L225 Difference]: With dead ends: 330 [2021-05-03 16:38:20,614 INFO L226 Difference]: Without dead ends: 315 [2021-05-03 16:38:20,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-03 16:38:20,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-05-03 16:38:20,634 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 16:38:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-05-03 16:38:20,634 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-05-03 16:38:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:20,635 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-05-03 16:38:20,635 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 16:38:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-05-03 16:38:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:38:20,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:20,636 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 16:38:20,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-05-03 16:38:20,836 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-05-03 16:38:20,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:20,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670896147] [2021-05-03 16:38:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:21,071 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 16:38:21,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670896147] [2021-05-03 16:38:21,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520937427] [2021-05-03 16:38:21,072 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 16:38:21,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:21,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:38:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:21,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:21,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16:38:21,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:21,437 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 16:38:21,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:21,447 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 16:38:21,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,456 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:21,456 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 16:38:21,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:21,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:21,508 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 16:38:21,508 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:71 [2021-05-03 16:38:21,620 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 16:38:21,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:21,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 16:38:21,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499456650] [2021-05-03 16:38:21,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:38:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:38:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:38:21,621 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 16:38:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:21,998 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-05-03 16:38:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:38:21,999 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 16:38:21,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:22,000 INFO L225 Difference]: With dead ends: 374 [2021-05-03 16:38:22,001 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 16:38:22,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:38:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 16:38:22,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-03 16:38:22,006 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 16:38:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-05-03 16:38:22,006 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-05-03 16:38:22,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:22,007 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-05-03 16:38:22,007 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 16:38:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-05-03 16:38:22,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:38:22,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:22,007 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 16:38:22,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 16:38:22,221 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-05-03 16:38:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:22,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869912072] [2021-05-03 16:38:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:22,335 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 16:38:22,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869912072] [2021-05-03 16:38:22,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793258819] [2021-05-03 16:38:22,335 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 16:38:22,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:38:22,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:38:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:22,465 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 16:38:22,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:22,468 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 16:38:22,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:22,471 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 16:38:22,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:22,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:22,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:38:22,480 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:67, output treesize:15 [2021-05-03 16:38:22,510 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 16:38:22,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:22,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 16:38:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381956473] [2021-05-03 16:38:22,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:22,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:22,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:22,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:22,512 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 16:38:22,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:22,682 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-05-03 16:38:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:38:22,682 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 16:38:22,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:22,684 INFO L225 Difference]: With dead ends: 363 [2021-05-03 16:38:22,684 INFO L226 Difference]: Without dead ends: 348 [2021-05-03 16:38:22,685 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:38:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-03 16:38:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-05-03 16:38:22,690 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 16:38:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-05-03 16:38:22,691 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-05-03 16:38:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:22,691 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-05-03 16:38:22,691 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 16:38:22,691 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-05-03 16:38:22,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:38:22,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:22,692 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 16:38:22,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:22,908 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:22,908 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-05-03 16:38:22,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:22,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546269581] [2021-05-03 16:38:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:23,050 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 16:38:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546269581] [2021-05-03 16:38:23,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831641137] [2021-05-03 16:38:23,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:23,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:23,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:38:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:23,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:23,303 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 16:38:23,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:23,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:23,315 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 16:38:23,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:23,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:23,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:23,370 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 16:38:23,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:23,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:23,379 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 16:38:23,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:23,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:23,444 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 16:38:23,444 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-05-03 16:38:23,527 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 16:38:23,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:23,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:23,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010445456] [2021-05-03 16:38:23,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:23,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:23,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:23,529 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 16:38:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:23,835 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-05-03 16:38:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:38:23,838 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 16:38:23,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:23,840 INFO L225 Difference]: With dead ends: 425 [2021-05-03 16:38:23,840 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 16:38:23,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 16:38:23,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-05-03 16:38:23,848 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 16:38:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-05-03 16:38:23,849 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-05-03 16:38:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:23,849 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-05-03 16:38:23,850 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 16:38:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-05-03 16:38:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:23,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:23,850 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 16:38:24,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:24,051 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-05-03 16:38:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:24,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717377553] [2021-05-03 16:38:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:24,103 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 16:38:24,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717377553] [2021-05-03 16:38:24,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237150769] [2021-05-03 16:38:24,104 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 16:38:24,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:38:24,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:24,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:24,218 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 16:38:24,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:24,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:24,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109467698] [2021-05-03 16:38:24,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:38:24,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:24,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:38:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:24,220 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 16:38:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:24,626 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-05-03 16:38:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:38:24,631 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 16:38:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:24,634 INFO L225 Difference]: With dead ends: 619 [2021-05-03 16:38:24,634 INFO L226 Difference]: Without dead ends: 619 [2021-05-03 16:38:24,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:38:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-03 16:38:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-05-03 16:38:24,640 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 16:38:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-05-03 16:38:24,641 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-05-03 16:38:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:24,641 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-05-03 16:38:24,641 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 16:38:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-05-03 16:38:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:24,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:24,642 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 16:38:24,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:24,856 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-05-03 16:38:24,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:24,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88928779] [2021-05-03 16:38:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:24,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88928779] [2021-05-03 16:38:24,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219129542] [2021-05-03 16:38:24,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:38:24,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:24,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:24,991 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 16:38:24,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:24,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404710461] [2021-05-03 16:38:24,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:24,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:24,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:24,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:24,992 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 16:38:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:25,653 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-05-03 16:38:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:38:25,654 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 16:38:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:25,658 INFO L225 Difference]: With dead ends: 1078 [2021-05-03 16:38:25,658 INFO L226 Difference]: Without dead ends: 1078 [2021-05-03 16:38:25,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 415.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:38:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-05-03 16:38:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-05-03 16:38:25,671 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 16:38:25,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-05-03 16:38:25,672 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-05-03 16:38:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:25,672 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-05-03 16:38:25,673 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 16:38:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-05-03 16:38:25,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:25,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:25,674 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 16:38:25,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:25,895 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:25,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-05-03 16:38:25,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:25,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331127923] [2021-05-03 16:38:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:25,937 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 16:38:25,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331127923] [2021-05-03 16:38:25,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354170894] [2021-05-03 16:38:25,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:38:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:25,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:25,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:26,054 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 16:38:26,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:26,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:26,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944614985] [2021-05-03 16:38:26,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:26,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:26,059 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 16:38:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:26,684 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-05-03 16:38:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:38:26,684 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 16:38:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:26,689 INFO L225 Difference]: With dead ends: 951 [2021-05-03 16:38:26,689 INFO L226 Difference]: Without dead ends: 951 [2021-05-03 16:38:26,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:38:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-03 16:38:26,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-05-03 16:38:26,701 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 16:38:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-05-03 16:38:26,703 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-05-03 16:38:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:26,704 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-05-03 16:38:26,704 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 16:38:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-05-03 16:38:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:26,706 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:26,706 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 16:38:26,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:26,913 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-05-03 16:38:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:26,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811424147] [2021-05-03 16:38:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:26,943 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 16:38:26,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811424147] [2021-05-03 16:38:26,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073582951] [2021-05-03 16:38:26,943 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 16:38:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:38:26,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:27,035 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 16:38:27,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:27,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:38:27,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599028226] [2021-05-03 16:38:27,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:38:27,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:27,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:38:27,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:38:27,037 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 16:38:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:27,168 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-05-03 16:38:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:38:27,169 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 16:38:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:27,172 INFO L225 Difference]: With dead ends: 669 [2021-05-03 16:38:27,172 INFO L226 Difference]: Without dead ends: 663 [2021-05-03 16:38:27,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-03 16:38:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-05-03 16:38:27,183 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 16:38:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-05-03 16:38:27,184 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-05-03 16:38:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:27,185 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-05-03 16:38:27,185 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 16:38:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-05-03 16:38:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:27,186 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:27,186 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 16:38:27,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 16:38:27,401 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:27,401 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-05-03 16:38:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:27,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638657763] [2021-05-03 16:38:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:27,432 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 16:38:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638657763] [2021-05-03 16:38:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999268384] [2021-05-03 16:38:27,432 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 16:38:27,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:27,534 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 16:38:27,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:27,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:38:27,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555050579] [2021-05-03 16:38:27,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:27,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:27,535 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 16:38:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:27,694 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-05-03 16:38:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:38:27,695 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 16:38:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:27,698 INFO L225 Difference]: With dead ends: 710 [2021-05-03 16:38:27,698 INFO L226 Difference]: Without dead ends: 672 [2021-05-03 16:38:27,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:38:27,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-03 16:38:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-05-03 16:38:27,711 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 16:38:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-05-03 16:38:27,713 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-05-03 16:38:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:27,713 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-05-03 16:38:27,714 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 16:38:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-05-03 16:38:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:27,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:27,715 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 16:38:27,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:27,932 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-05-03 16:38:27,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:27,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881620740] [2021-05-03 16:38:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:27,959 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 16:38:27,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881620740] [2021-05-03 16:38:27,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414138896] [2021-05-03 16:38:27,960 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 16:38:27,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:27,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:38:27,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:28,024 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 16:38:28,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:28,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:38:28,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630570489] [2021-05-03 16:38:28,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:38:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:38:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:38:28,025 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 16:38:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:28,132 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-05-03 16:38:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:38:28,133 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 16:38:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:28,137 INFO L225 Difference]: With dead ends: 830 [2021-05-03 16:38:28,137 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 16:38:28,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 16:38:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-05-03 16:38:28,152 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 16:38:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-05-03 16:38:28,154 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-05-03 16:38:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:28,154 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-05-03 16:38:28,154 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 16:38:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-05-03 16:38:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:28,156 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:28,156 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 16:38:28,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:28,369 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-05-03 16:38:28,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:28,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050439705] [2021-05-03 16:38:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:28,401 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 16:38:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050439705] [2021-05-03 16:38:28,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102550929] [2021-05-03 16:38:28,402 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 16:38:28,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:28,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:28,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:28,481 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 16:38:28,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:28,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:38:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66123060] [2021-05-03 16:38:28,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:28,482 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 16:38:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:28,730 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-05-03 16:38:28,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:38:28,730 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 16:38:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:28,734 INFO L225 Difference]: With dead ends: 1196 [2021-05-03 16:38:28,734 INFO L226 Difference]: Without dead ends: 1196 [2021-05-03 16:38:28,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:38:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-05-03 16:38:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-05-03 16:38:28,746 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 16:38:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-05-03 16:38:28,748 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-05-03 16:38:28,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:28,748 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-05-03 16:38:28,748 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 16:38:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-05-03 16:38:28,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:28,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:28,749 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 16:38:28,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 16:38:28,961 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-05-03 16:38:28,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:28,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756349495] [2021-05-03 16:38:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:28,991 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 16:38:28,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756349495] [2021-05-03 16:38:28,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248643367] [2021-05-03 16:38:28,991 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 16:38:29,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:29,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:29,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:29,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:38:29,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:29,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:38:29,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463105932] [2021-05-03 16:38:29,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:29,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:29,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:29,069 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 16:38:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:29,489 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-05-03 16:38:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:38:29,489 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 16:38:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:29,494 INFO L225 Difference]: With dead ends: 1492 [2021-05-03 16:38:29,494 INFO L226 Difference]: Without dead ends: 1492 [2021-05-03 16:38:29,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:38:29,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-05-03 16:38:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-05-03 16:38:29,510 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 16:38:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-05-03 16:38:29,512 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-05-03 16:38:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:29,512 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-05-03 16:38:29,512 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 16:38:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-05-03 16:38:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:29,513 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:29,514 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 16:38:29,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 16:38:29,729 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:29,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-05-03 16:38:29,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:29,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180115190] [2021-05-03 16:38:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:29,758 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 16:38:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180115190] [2021-05-03 16:38:29,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567338800] [2021-05-03 16:38:29,759 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 16:38:29,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:29,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:29,853 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 16:38:29,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:29,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:38:29,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324706013] [2021-05-03 16:38:29,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:29,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:29,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:29,854 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 16:38:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:30,086 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-05-03 16:38:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:38:30,086 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 16:38:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:30,090 INFO L225 Difference]: With dead ends: 1258 [2021-05-03 16:38:30,090 INFO L226 Difference]: Without dead ends: 1248 [2021-05-03 16:38:30,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:38:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-03 16:38:30,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-05-03 16:38:30,102 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 16:38:30,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-05-03 16:38:30,104 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-05-03 16:38:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:30,104 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-05-03 16:38:30,104 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 16:38:30,104 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-05-03 16:38:30,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:30,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:30,106 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 16:38:30,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 16:38:30,321 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-05-03 16:38:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:30,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460657057] [2021-05-03 16:38:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:30,368 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 16:38:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460657057] [2021-05-03 16:38:30,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371410573] [2021-05-03 16:38:30,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:30,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:30,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:30,461 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 16:38:30,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:30,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:38:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529516054] [2021-05-03 16:38:30,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:30,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:30,464 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 16:38:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:30,727 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-05-03 16:38:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:38:30,728 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 16:38:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:30,732 INFO L225 Difference]: With dead ends: 1329 [2021-05-03 16:38:30,732 INFO L226 Difference]: Without dead ends: 1329 [2021-05-03 16:38:30,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:38:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-03 16:38:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-05-03 16:38:30,744 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 16:38:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-05-03 16:38:30,746 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-05-03 16:38:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:30,746 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-05-03 16:38:30,746 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 16:38:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-05-03 16:38:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:30,747 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:30,747 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 16:38:30,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:30,962 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-05-03 16:38:30,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:30,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711117008] [2021-05-03 16:38:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:31,003 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 16:38:31,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711117008] [2021-05-03 16:38:31,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090838387] [2021-05-03 16:38:31,003 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 16:38:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:31,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:31,076 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 16:38:31,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:31,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:38:31,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764103152] [2021-05-03 16:38:31,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:31,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:31,077 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 16:38:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:31,377 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-05-03 16:38:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:38:31,377 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 16:38:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:31,382 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 16:38:31,382 INFO L226 Difference]: Without dead ends: 1544 [2021-05-03 16:38:31,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:38:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-05-03 16:38:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-05-03 16:38:31,397 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 16:38:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-05-03 16:38:31,399 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-05-03 16:38:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:31,399 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-05-03 16:38:31,399 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 16:38:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-05-03 16:38:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:31,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:31,401 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 16:38:31,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:31,616 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-05-03 16:38:31,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:31,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130627428] [2021-05-03 16:38:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:31,656 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 16:38:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130627428] [2021-05-03 16:38:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082340284] [2021-05-03 16:38:31,656 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) [2021-05-03 16:38:31,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:31,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:31,775 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 16:38:31,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:31,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:31,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536793540] [2021-05-03 16:38:31,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:31,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:31,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:31,777 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 16:38:32,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:32,419 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-05-03 16:38:32,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:38:32,420 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 16:38:32,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:32,429 INFO L225 Difference]: With dead ends: 2734 [2021-05-03 16:38:32,429 INFO L226 Difference]: Without dead ends: 2734 [2021-05-03 16:38:32,429 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:38:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-05-03 16:38:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-05-03 16:38:32,452 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 16:38:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-05-03 16:38:32,454 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-05-03 16:38:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:32,454 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-05-03 16:38:32,454 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 16:38:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-05-03 16:38:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:32,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:32,456 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 16:38:32,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:32,671 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-05-03 16:38:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:32,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90738771] [2021-05-03 16:38:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:32,723 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 16:38:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90738771] [2021-05-03 16:38:32,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314999176] [2021-05-03 16:38:32,724 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 16:38:32,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:32,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:32,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:32,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:32,869 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 16:38:32,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:32,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:32,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444630522] [2021-05-03 16:38:32,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:32,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:32,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:32,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:32,870 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 16:38:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:33,577 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-05-03 16:38:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:38:33,578 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 16:38:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:33,585 INFO L225 Difference]: With dead ends: 2693 [2021-05-03 16:38:33,585 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 16:38:33,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:38:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 16:38:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-05-03 16:38:33,618 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 16:38:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-05-03 16:38:33,621 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-05-03 16:38:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:33,621 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-05-03 16:38:33,621 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 16:38:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-05-03 16:38:33,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:33,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:33,623 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 16:38:33,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:38:33,837 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:33,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-05-03 16:38:33,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:33,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607587070] [2021-05-03 16:38:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:33,865 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 16:38:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607587070] [2021-05-03 16:38:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813591390] [2021-05-03 16:38:33,865 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 16:38:33,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:33,970 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 16:38:33,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:33,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:33,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749091353] [2021-05-03 16:38:33,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:38:33,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:33,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:38:33,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:33,973 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 16:38:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:34,538 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-05-03 16:38:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:38:34,539 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 16:38:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:34,544 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:38:34,544 INFO L226 Difference]: Without dead ends: 2677 [2021-05-03 16:38:34,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:38:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-05-03 16:38:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-05-03 16:38:34,567 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 16:38:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-05-03 16:38:34,569 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-05-03 16:38:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:34,570 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-05-03 16:38:34,570 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 16:38:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-05-03 16:38:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:34,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:34,571 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 16:38:34,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 16:38:34,786 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:34,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-05-03 16:38:34,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:34,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595282899] [2021-05-03 16:38:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:34,818 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 16:38:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595282899] [2021-05-03 16:38:34,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901814122] [2021-05-03 16:38:34,819 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) [2021-05-03 16:38:34,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:38:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:34,891 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 16:38:34,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:34,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:34,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223564784] [2021-05-03 16:38:34,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:38:34,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:38:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:34,892 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 16:38:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:35,413 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-05-03 16:38:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:38:35,413 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 16:38:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:35,419 INFO L225 Difference]: With dead ends: 2474 [2021-05-03 16:38:35,419 INFO L226 Difference]: Without dead ends: 2470 [2021-05-03 16:38:35,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:38:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-05-03 16:38:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-05-03 16:38:35,452 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 16:38:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-05-03 16:38:35,454 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-05-03 16:38:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:35,454 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-05-03 16:38:35,455 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 16:38:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-05-03 16:38:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:35,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:35,457 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 16:38:35,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:35,679 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:35,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:35,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-05-03 16:38:35,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:35,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129833050] [2021-05-03 16:38:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:35,719 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 16:38:35,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129833050] [2021-05-03 16:38:35,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125302056] [2021-05-03 16:38:35,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:35,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:38:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:35,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:35,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:35,818 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 16:38:35,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:35,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:35,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124711487] [2021-05-03 16:38:35,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:35,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:35,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:35,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:35,819 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 16:38:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:36,402 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-05-03 16:38:36,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:38:36,403 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 16:38:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:36,407 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 16:38:36,407 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 16:38:36,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:38:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 16:38:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-05-03 16:38:36,427 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 16:38:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-05-03 16:38:36,429 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-05-03 16:38:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:36,429 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-05-03 16:38:36,429 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 16:38:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-05-03 16:38:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:36,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:36,431 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] [2021-05-03 16:38:36,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 16:38:36,646 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:36,647 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-05-03 16:38:36,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:36,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488929142] [2021-05-03 16:38:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:36,682 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 16:38:36,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488929142] [2021-05-03 16:38:36,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748275469] [2021-05-03 16:38:36,682 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 16:38:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:36,761 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 16:38:36,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:36,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:36,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868060330] [2021-05-03 16:38:36,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:36,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:36,763 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 16:38:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:37,333 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-05-03 16:38:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:38:37,333 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 16:38:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:37,337 INFO L225 Difference]: With dead ends: 2332 [2021-05-03 16:38:37,337 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 16:38:37,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:38:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 16:38:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-05-03 16:38:37,358 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 16:38:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-05-03 16:38:37,359 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-05-03 16:38:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:37,360 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-05-03 16:38:37,360 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 16:38:37,360 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-05-03 16:38:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:37,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:37,361 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 16:38:37,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 16:38:37,576 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-05-03 16:38:37,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:37,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112523086] [2021-05-03 16:38:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:37,603 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 16:38:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112523086] [2021-05-03 16:38:37,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243240768] [2021-05-03 16:38:37,604 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 16:38:37,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:38:37,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:38:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:37,685 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 16:38:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:38:37,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743886911] [2021-05-03 16:38:37,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:38:37,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:38:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:38:37,686 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 16:38:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:37,764 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-05-03 16:38:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:38:37,764 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 16:38:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:37,765 INFO L225 Difference]: With dead ends: 929 [2021-05-03 16:38:37,766 INFO L226 Difference]: Without dead ends: 929 [2021-05-03 16:38:37,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-05-03 16:38:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-05-03 16:38:37,776 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 16:38:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-05-03 16:38:37,778 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-05-03 16:38:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:37,778 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-05-03 16:38:37,778 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 16:38:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-05-03 16:38:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:37,779 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:37,779 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 16:38:37,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:37,989 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-05-03 16:38:37,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:37,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881537204] [2021-05-03 16:38:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:38,018 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 16:38:38,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881537204] [2021-05-03 16:38:38,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732344] [2021-05-03 16:38:38,019 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 16:38:38,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:38,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:38,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:38,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:38,085 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 16:38:38,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:38,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:38:38,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540239635] [2021-05-03 16:38:38,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:38:38,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:38,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:38:38,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:38:38,086 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 16:38:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:38,357 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-05-03 16:38:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:38:38,358 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 16:38:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:38,361 INFO L225 Difference]: With dead ends: 1555 [2021-05-03 16:38:38,361 INFO L226 Difference]: Without dead ends: 1555 [2021-05-03 16:38:38,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:38:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-05-03 16:38:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-05-03 16:38:38,379 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 16:38:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-05-03 16:38:38,382 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-05-03 16:38:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:38,382 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-05-03 16:38:38,382 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 16:38:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-05-03 16:38:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:38,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:38,385 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 16:38:38,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 16:38:38,606 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:38,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-05-03 16:38:38,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:38,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50391390] [2021-05-03 16:38:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:38,635 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 16:38:38,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50391390] [2021-05-03 16:38:38,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594198015] [2021-05-03 16:38:38,636 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 16:38:38,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:38,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:38,710 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 16:38:38,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:38,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:38:38,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914829579] [2021-05-03 16:38:38,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:38:38,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:38:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:38:38,711 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 16:38:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:38,969 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-05-03 16:38:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:38:38,969 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 16:38:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:38,972 INFO L225 Difference]: With dead ends: 1605 [2021-05-03 16:38:38,972 INFO L226 Difference]: Without dead ends: 1605 [2021-05-03 16:38:38,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:38:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-05-03 16:38:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-05-03 16:38:38,991 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 16:38:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-05-03 16:38:38,994 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-05-03 16:38:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:38,995 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-05-03 16:38:38,995 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 16:38:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-05-03 16:38:38,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:38,997 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:38,997 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 16:38:39,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:39,209 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:39,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:39,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-05-03 16:38:39,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:39,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865149616] [2021-05-03 16:38:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:39,235 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 16:38:39,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865149616] [2021-05-03 16:38:39,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770448473] [2021-05-03 16:38:39,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:38:39,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:39,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:39,296 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 16:38:39,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:39,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:38:39,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319425873] [2021-05-03 16:38:39,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:38:39,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:39,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:38:39,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:38:39,297 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 16:38:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:39,490 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-05-03 16:38:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:38:39,490 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 16:38:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:39,493 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 16:38:39,493 INFO L226 Difference]: Without dead ends: 1520 [2021-05-03 16:38:39,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:38:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-05-03 16:38:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-05-03 16:38:39,511 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 16:38:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-05-03 16:38:39,514 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-05-03 16:38:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:39,514 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-05-03 16:38:39,514 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 16:38:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-05-03 16:38:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:39,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:39,516 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 16:38:39,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-03 16:38:39,733 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:39,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-05-03 16:38:39,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:39,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610638830] [2021-05-03 16:38:39,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:39,790 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 16:38:39,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610638830] [2021-05-03 16:38:39,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96072702] [2021-05-03 16:38:39,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:38:39,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:38:39,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:39,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:39,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:39,903 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 16:38:39,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:39,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:38:39,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083569415] [2021-05-03 16:38:39,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:38:39,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:38:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:38:39,905 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 16:38:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:40,106 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-05-03 16:38:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:38:40,107 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 16:38:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:40,109 INFO L225 Difference]: With dead ends: 1508 [2021-05-03 16:38:40,109 INFO L226 Difference]: Without dead ends: 1496 [2021-05-03 16:38:40,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:38:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-05-03 16:38:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-05-03 16:38:40,121 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 16:38:40,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-05-03 16:38:40,123 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-05-03 16:38:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:40,123 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-05-03 16:38:40,123 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 16:38:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-05-03 16:38:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:40,126 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:40,126 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 16:38:40,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:40,341 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-05-03 16:38:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:40,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080944476] [2021-05-03 16:38:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:40,370 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 16:38:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080944476] [2021-05-03 16:38:40,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199056313] [2021-05-03 16:38:40,370 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 16:38:40,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:40,454 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 16:38:40,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:40,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699564497] [2021-05-03 16:38:40,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:40,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:40,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:40,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:40,455 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 16:38:40,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:40,909 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-05-03 16:38:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:38:40,910 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 16:38:40,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:40,912 INFO L225 Difference]: With dead ends: 2412 [2021-05-03 16:38:40,913 INFO L226 Difference]: Without dead ends: 2412 [2021-05-03 16:38:40,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:38:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-03 16:38:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-05-03 16:38:40,929 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 16:38:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-05-03 16:38:40,931 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-05-03 16:38:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:40,931 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-05-03 16:38:40,931 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 16:38:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-05-03 16:38:40,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:40,933 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:40,933 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 16:38:41,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 16:38:41,147 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-05-03 16:38:41,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:41,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040578216] [2021-05-03 16:38:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:41,179 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 16:38:41,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040578216] [2021-05-03 16:38:41,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269608809] [2021-05-03 16:38:41,179 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 16:38:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:41,290 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 16:38:41,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:41,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968502341] [2021-05-03 16:38:41,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:41,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:41,291 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 16:38:41,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:41,751 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-05-03 16:38:41,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:38:41,751 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 16:38:41,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:41,754 INFO L225 Difference]: With dead ends: 2335 [2021-05-03 16:38:41,754 INFO L226 Difference]: Without dead ends: 2335 [2021-05-03 16:38:41,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 301.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:38:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-03 16:38:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-05-03 16:38:41,770 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 16:38:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:38:41,772 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:38:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:41,772 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:38:41,773 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 16:38:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:38:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:41,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:41,774 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 16:38:41,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:41,988 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:41,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-05-03 16:38:41,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:41,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972612268] [2021-05-03 16:38:41,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:42,021 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 16:38:42,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972612268] [2021-05-03 16:38:42,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619262140] [2021-05-03 16:38:42,021 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 16:38:42,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:42,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:42,115 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 16:38:42,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:42,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:42,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255220050] [2021-05-03 16:38:42,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:38:42,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:42,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:38:42,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:42,117 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 16:38:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:42,495 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-05-03 16:38:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:38:42,499 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 16:38:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:42,503 INFO L225 Difference]: With dead ends: 2285 [2021-05-03 16:38:42,503 INFO L226 Difference]: Without dead ends: 2285 [2021-05-03 16:38:42,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:38:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-05-03 16:38:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-05-03 16:38:42,525 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 16:38:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:38:42,526 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:38:42,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:42,527 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:38:42,527 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 16:38:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:38:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:42,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:42,528 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 16:38:42,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-05-03 16:38:42,743 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:42,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-05-03 16:38:42,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:42,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157176722] [2021-05-03 16:38:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:42,776 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 16:38:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157176722] [2021-05-03 16:38:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33494069] [2021-05-03 16:38:42,776 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 16:38:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:42,852 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 16:38:42,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:42,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602059408] [2021-05-03 16:38:42,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:38:42,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:38:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:42,853 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 16:38:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:43,189 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-05-03 16:38:43,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:38:43,189 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 16:38:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:43,192 INFO L225 Difference]: With dead ends: 2176 [2021-05-03 16:38:43,192 INFO L226 Difference]: Without dead ends: 2172 [2021-05-03 16:38:43,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:38:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-05-03 16:38:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-05-03 16:38:43,209 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 16:38:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:38:43,211 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:38:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:43,211 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:38:43,211 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 16:38:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:38:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:43,214 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:43,214 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] [2021-05-03 16:38:43,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:43,423 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:43,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:43,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-05-03 16:38:43,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:43,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163167615] [2021-05-03 16:38:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:43,450 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 16:38:43,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163167615] [2021-05-03 16:38:43,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652505915] [2021-05-03 16:38:43,451 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 16:38:43,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:43,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:43,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:43,538 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 16:38:43,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:43,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:43,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588264016] [2021-05-03 16:38:43,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:43,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:43,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:43,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:43,539 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 16:38:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:43,914 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-05-03 16:38:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:38:43,914 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 16:38:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:43,917 INFO L225 Difference]: With dead ends: 2199 [2021-05-03 16:38:43,917 INFO L226 Difference]: Without dead ends: 2199 [2021-05-03 16:38:43,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:38:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-05-03 16:38:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-05-03 16:38:43,933 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 16:38:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:38:43,935 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:38:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:43,935 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:38:43,935 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 16:38:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:38:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:43,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:43,937 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] [2021-05-03 16:38:44,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 16:38:44,149 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-05-03 16:38:44,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:44,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662529059] [2021-05-03 16:38:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:44,186 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 16:38:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662529059] [2021-05-03 16:38:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267964872] [2021-05-03 16:38:44,187 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 16:38:44,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:38:44,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:44,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:44,266 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 16:38:44,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:44,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:44,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916907515] [2021-05-03 16:38:44,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:44,267 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 16:38:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:44,628 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-05-03 16:38:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:38:44,629 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 16:38:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:44,632 INFO L225 Difference]: With dead ends: 2156 [2021-05-03 16:38:44,632 INFO L226 Difference]: Without dead ends: 2152 [2021-05-03 16:38:44,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:38:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-05-03 16:38:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-05-03 16:38:44,657 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 16:38:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:38:44,659 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:38:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:44,659 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:38:44,659 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 16:38:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:38:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:44,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:44,661 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 16:38:44,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 16:38:44,875 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-05-03 16:38:44,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:44,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634507805] [2021-05-03 16:38:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:44,922 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 16:38:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634507805] [2021-05-03 16:38:44,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305503727] [2021-05-03 16:38:44,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:44,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:44,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:44,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:44,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:44,997 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 16:38:44,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:44,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:38:44,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408159039] [2021-05-03 16:38:44,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:44,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:44,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:44,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:44,999 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 16:38:45,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:45,316 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-05-03 16:38:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:38:45,317 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 16:38:45,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:45,320 INFO L225 Difference]: With dead ends: 2097 [2021-05-03 16:38:45,320 INFO L226 Difference]: Without dead ends: 2097 [2021-05-03 16:38:45,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:38:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-05-03 16:38:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-05-03 16:38:45,337 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 16:38:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-05-03 16:38:45,339 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-05-03 16:38:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:45,339 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-05-03 16:38:45,339 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 16:38:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-05-03 16:38:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:45,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:45,341 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 16:38:45,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 16:38:45,542 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-05-03 16:38:45,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:45,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261918802] [2021-05-03 16:38:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:45,580 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 16:38:45,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261918802] [2021-05-03 16:38:45,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903132358] [2021-05-03 16:38:45,582 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 16:38:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:45,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:45,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:45,668 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 16:38:45,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:45,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:38:45,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461226737] [2021-05-03 16:38:45,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:45,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:45,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:45,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:45,671 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 16:38:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:45,929 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-05-03 16:38:45,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:38:45,929 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 16:38:45,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:45,932 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 16:38:45,932 INFO L226 Difference]: Without dead ends: 1959 [2021-05-03 16:38:45,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:38:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-05-03 16:38:45,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-05-03 16:38:45,947 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 16:38:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-05-03 16:38:45,949 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-05-03 16:38:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:45,949 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-05-03 16:38:45,949 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 16:38:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-05-03 16:38:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:45,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:45,950 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 16:38:46,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:46,165 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-05-03 16:38:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:46,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868929231] [2021-05-03 16:38:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:46,191 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 16:38:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868929231] [2021-05-03 16:38:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287409253] [2021-05-03 16:38:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:46,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:38:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:46,257 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 16:38:46,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:46,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:38:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575008590] [2021-05-03 16:38:46,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:38:46,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:38:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:38:46,258 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 16:38:46,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:46,472 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-05-03 16:38:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:38:46,473 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 16:38:46,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:46,475 INFO L225 Difference]: With dead ends: 1728 [2021-05-03 16:38:46,475 INFO L226 Difference]: Without dead ends: 1716 [2021-05-03 16:38:46,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:38:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-05-03 16:38:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-05-03 16:38:46,492 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 16:38:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-05-03 16:38:46,494 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-05-03 16:38:46,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:46,494 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-05-03 16:38:46,494 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 16:38:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-05-03 16:38:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:46,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:46,495 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 16:38:46,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:46,696 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:46,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:46,696 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-05-03 16:38:46,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:46,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084466775] [2021-05-03 16:38:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:46,738 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 16:38:46,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084466775] [2021-05-03 16:38:46,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359213978] [2021-05-03 16:38:46,739 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 16:38:46,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:38:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:46,826 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 16:38:46,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:46,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:46,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126236279] [2021-05-03 16:38:46,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:46,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:46,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:46,827 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 16:38:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:47,129 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-05-03 16:38:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:38:47,136 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 16:38:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:47,140 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 16:38:47,140 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 16:38:47,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:38:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 16:38:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-05-03 16:38:47,164 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 16:38:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-05-03 16:38:47,167 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-05-03 16:38:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:47,167 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-05-03 16:38:47,167 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 16:38:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-05-03 16:38:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:47,170 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:47,170 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 16:38:47,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:47,384 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-05-03 16:38:47,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:47,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268013671] [2021-05-03 16:38:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:47,414 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 16:38:47,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268013671] [2021-05-03 16:38:47,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373511014] [2021-05-03 16:38:47,415 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 16:38:47,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:47,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:47,495 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 16:38:47,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:47,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:38:47,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475572884] [2021-05-03 16:38:47,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:38:47,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:47,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:38:47,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:38:47,496 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 16:38:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:47,752 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-05-03 16:38:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:38:47,752 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 16:38:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:47,755 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 16:38:47,755 INFO L226 Difference]: Without dead ends: 1786 [2021-05-03 16:38:47,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:38:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-05-03 16:38:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-05-03 16:38:47,770 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 16:38:47,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-05-03 16:38:47,772 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-05-03 16:38:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:47,772 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-05-03 16:38:47,772 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 16:38:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-05-03 16:38:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:38:47,773 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:47,773 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 16:38:47,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-03 16:38:47,974 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-05-03 16:38:47,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:47,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806948041] [2021-05-03 16:38:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:47,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:48,028 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 16:38:48,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806948041] [2021-05-03 16:38:48,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821557072] [2021-05-03 16:38:48,028 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 16:38:48,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:38:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:38:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:48,102 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 16:38:48,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:48,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:38:48,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494984791] [2021-05-03 16:38:48,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:38:48,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:38:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:38:48,103 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 16:38:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:48,268 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-05-03 16:38:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:38:48,269 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 16:38:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:48,271 INFO L225 Difference]: With dead ends: 1649 [2021-05-03 16:38:48,271 INFO L226 Difference]: Without dead ends: 1637 [2021-05-03 16:38:48,271 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-05-03 16:38:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-05-03 16:38:48,285 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 16:38:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-05-03 16:38:48,287 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-05-03 16:38:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:48,287 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-05-03 16:38:48,287 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 16:38:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-05-03 16:38:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:48,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:48,288 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 16:38:48,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:48,503 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-05-03 16:38:48,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:48,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7516064] [2021-05-03 16:38:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:48,780 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 16:38:48,909 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 16:38:49,034 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 16:38:49,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7516064] [2021-05-03 16:38:49,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119797057] [2021-05-03 16:38:49,034 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 16:38:49,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:38:49,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:49,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:38:49,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:38:49,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:38:49,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:38:49,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,599 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 33 treesize of output 19 [2021-05-03 16:38:49,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:49,608 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:38:49,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,622 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 16:38:49,623 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:38:49,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:49,637 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,642 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 30 treesize of output 16 [2021-05-03 16:38:49,644 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:38:49,650 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:38:49,656 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:38:49,662 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:38:49,667 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:49,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:49,671 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 30 treesize of output 13 [2021-05-03 16:38:49,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:49,690 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:38:49,691 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 16:38:49,691 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:38:49,718 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 16:38:49,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:49,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:38:49,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177517975] [2021-05-03 16:38:49,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:38:49,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:38:49,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:49,719 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 16:38:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:50,514 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-05-03 16:38:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:38:50,514 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 16:38:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:50,516 INFO L225 Difference]: With dead ends: 1517 [2021-05-03 16:38:50,516 INFO L226 Difference]: Without dead ends: 1502 [2021-05-03 16:38:50,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1122.5ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:38:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-05-03 16:38:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-05-03 16:38:50,528 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 16:38:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-05-03 16:38:50,531 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-05-03 16:38:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:50,532 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-05-03 16:38:50,532 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 16:38:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-05-03 16:38:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:50,534 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:50,534 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 16:38:50,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:50,735 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-05-03 16:38:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:50,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333865100] [2021-05-03 16:38:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:51,154 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-05-03 16:38:51,278 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 16:38:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333865100] [2021-05-03 16:38:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030990648] [2021-05-03 16:38:51,279 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 16:38:51,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:38:51,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:51,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:38:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:51,776 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:38:51,818 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_3, v_prenex_5]} [2021-05-03 16:38:51,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:51,822 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 16:38:51,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:51,934 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:38:51,935 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-05-03 16:38:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:51,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:51,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:51,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:51,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:51,966 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 23 treesize of output 13 [2021-05-03 16:38:51,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:51,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:51,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:38:51,988 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-05-03 16:38:52,016 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 16:38:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:52,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:38:52,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708514076] [2021-05-03 16:38:52,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:38:52,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:38:52,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:52,017 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:53,153 INFO L93 Difference]: Finished difference Result 1714 states and 5519 transitions. [2021-05-03 16:38:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:38:53,154 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 16:38:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:53,156 INFO L225 Difference]: With dead ends: 1714 [2021-05-03 16:38:53,156 INFO L226 Difference]: Without dead ends: 1684 [2021-05-03 16:38:53,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:38:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-05-03 16:38:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1168. [2021-05-03 16:38:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-05-03 16:38:53,173 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-05-03 16:38:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:53,173 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-05-03 16:38:53,173 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 16:38:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-05-03 16:38:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:53,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:53,175 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 16:38:53,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:53,375 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-05-03 16:38:53,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:53,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211356279] [2021-05-03 16:38:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:53,849 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 16:38:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211356279] [2021-05-03 16:38:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032000436] [2021-05-03 16:38:53,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:38:53,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:53,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:38:53,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:54,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,577 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 35 treesize of output 19 [2021-05-03 16:38:54,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:38:54,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:38:54,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:38:54,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:38:54,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:38:54,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:38:54,643 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:38:54,654 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:38:54,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:38:54,680 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:38:54,690 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:38:54,701 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:38:54,728 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:38:54,736 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:54,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:38:54,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:38:54,742 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:54,761 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:38:54,763 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 16:38:54,764 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:38:54,793 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 16:38:54,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:54,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:38:54,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507188097] [2021-05-03 16:38:54,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:38:54,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:54,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:38:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:38:54,794 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 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 16:38:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:38:56,787 INFO L93 Difference]: Finished difference Result 1659 states and 5345 transitions. [2021-05-03 16:38:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:38:56,787 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 16:38:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:38:56,790 INFO L225 Difference]: With dead ends: 1659 [2021-05-03 16:38:56,790 INFO L226 Difference]: Without dead ends: 1644 [2021-05-03 16:38:56,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2012.3ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:38:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-05-03 16:38:56,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1198. [2021-05-03 16:38:56,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-05-03 16:38:56,805 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-05-03 16:38:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:38:56,805 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-05-03 16:38:56,805 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 16:38:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-05-03 16:38:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:38:56,806 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:38:56,806 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 16:38:57,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:38:57,009 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:38:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:38:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-05-03 16:38:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:38:57,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026681377] [2021-05-03 16:38:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:38:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:38:57,390 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 16:38:57,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026681377] [2021-05-03 16:38:57,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831142353] [2021-05-03 16:38:57,390 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 16:38:57,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:38:57,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:38:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:38:57,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:38:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:57,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,698 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:57,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,709 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:57,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:38:57,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:38:57,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,747 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:57,747 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 21 treesize of output 17 [2021-05-03 16:38:57,749 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:57,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:57,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,777 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:38:57,778 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,791 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 35 treesize of output 1 [2021-05-03 16:38:57,792 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,801 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,802 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 16:38:57,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:38:57,815 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 28 treesize of output 24 [2021-05-03 16:38:57,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,829 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:57,830 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,842 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:57,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:38:57,844 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:38:57,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,868 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:38:57,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-05-03 16:38:57,869 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:38:57,878 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:38:57,878 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 35 treesize of output 1 [2021-05-03 16:38:57,879 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:38:57,954 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-05-03 16:38:57,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:38:57,955 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-05-03 16:38:58,037 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 16:38:58,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:38:58,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:38:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160358052] [2021-05-03 16:38:58,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:38:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:38:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:38:58,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:38:58,038 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:38:58,559 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-03 16:38:58,833 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 16:38:59,398 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-05-03 16:38:59,590 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-05-03 16:38:59,963 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-05-03 16:39:00,130 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 16:39:00,492 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-05-03 16:39:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:00,765 INFO L93 Difference]: Finished difference Result 1861 states and 5918 transitions. [2021-05-03 16:39:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:39:00,766 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 16:39:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:00,768 INFO L225 Difference]: With dead ends: 1861 [2021-05-03 16:39:00,768 INFO L226 Difference]: Without dead ends: 1846 [2021-05-03 16:39:00,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2562.1ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:39:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-05-03 16:39:00,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1207. [2021-05-03 16:39:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 3.341625207296849) internal successors, (4030), 1206 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 4030 transitions. [2021-05-03 16:39:00,785 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 4030 transitions. Word has length 26 [2021-05-03 16:39:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:00,785 INFO L480 AbstractCegarLoop]: Abstraction has 1207 states and 4030 transitions. [2021-05-03 16:39:00,785 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 16:39:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 4030 transitions. [2021-05-03 16:39:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:00,787 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:00,787 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 16:39:00,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-05-03 16:39:00,988 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:00,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:00,988 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-05-03 16:39:00,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:00,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706999885] [2021-05-03 16:39:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:01,348 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 16:39:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706999885] [2021-05-03 16:39:01,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420297904] [2021-05-03 16:39:01,348 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 16:39:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:39:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,910 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 39 treesize of output 19 [2021-05-03 16:39:01,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:01,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,927 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 41 treesize of output 13 [2021-05-03 16:39:01,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,937 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 41 treesize of output 16 [2021-05-03 16:39:01,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:39:01,946 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:01,954 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:39:01,964 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:01,974 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:01,984 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:01,993 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:01,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:01,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:02,003 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:39:02,011 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:02,019 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,028 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:39:02,029 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:02,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:02,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:02,033 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 28 treesize of output 13 [2021-05-03 16:39:02,034 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:02,054 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:39:02,056 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 16:39:02,056 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:39:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:02,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:02,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:39:02,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295012357] [2021-05-03 16:39:02,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:39:02,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:39:02,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:39:02,082 INFO L87 Difference]: Start difference. First operand 1207 states and 4030 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 16:39:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:04,924 INFO L93 Difference]: Finished difference Result 1906 states and 6069 transitions. [2021-05-03 16:39:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:39:04,925 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 16:39:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:04,927 INFO L225 Difference]: With dead ends: 1906 [2021-05-03 16:39:04,927 INFO L226 Difference]: Without dead ends: 1891 [2021-05-03 16:39:04,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2794.0ms TimeCoverageRelationStatistics Valid=500, Invalid=2362, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 16:39:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-05-03 16:39:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1218. [2021-05-03 16:39:04,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.3475760065735414) internal successors, (4074), 1217 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 4074 transitions. [2021-05-03 16:39:04,943 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 4074 transitions. Word has length 26 [2021-05-03 16:39:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:04,943 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 4074 transitions. [2021-05-03 16:39:04,944 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 16:39:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 4074 transitions. [2021-05-03 16:39:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:04,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:04,945 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 16:39:05,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:05,146 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-05-03 16:39:05,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:05,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252881179] [2021-05-03 16:39:05,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:05,515 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 16:39:05,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252881179] [2021-05-03 16:39:05,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806537300] [2021-05-03 16:39:05,515 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 16:39:05,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:39:05,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:05,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:39:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:06,182 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-05-03 16:39:06,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-05-03 16:39:06,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,248 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-05-03 16:39:06,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-05-03 16:39:06,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,295 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-05-03 16:39:06,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:39:06,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,334 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-05-03 16:39:06,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:39:06,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,397 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-05-03 16:39:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-05-03 16:39:06,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,441 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-05-03 16:39:06,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:39:06,442 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,491 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-05-03 16:39:06,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-05-03 16:39:06,512 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,559 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-05-03 16:39:06,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-05-03 16:39:06,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,603 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-05-03 16:39:06,603 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:39:06,605 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,653 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-05-03 16:39:06,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-05-03 16:39:06,663 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,686 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-05-03 16:39:06,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 1 [2021-05-03 16:39:06,687 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,725 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-05-03 16:39:06,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-05-03 16:39:06,738 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,776 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-05-03 16:39:06,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-05-03 16:39:06,787 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,809 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-05-03 16:39:06,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:39:06,810 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,849 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-05-03 16:39:06,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-05-03 16:39:06,858 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:06,892 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-05-03 16:39:06,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-05-03 16:39:06,899 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:07,184 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2021-05-03 16:39:07,185 INFO L628 ElimStorePlain]: treesize reduction 308, result has 48.5 percent of original size [2021-05-03 16:39:07,191 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 16:39:07,191 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:341 [2021-05-03 16:39:07,414 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-05-03 16:39:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:07,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:07,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 16:39:07,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285188881] [2021-05-03 16:39:07,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:39:07,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:39:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:39:07,594 INFO L87 Difference]: Start difference. First operand 1218 states and 4074 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:09,207 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-05-03 16:39:09,459 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-05-03 16:39:09,942 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-05-03 16:39:10,364 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-05-03 16:39:10,763 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-05-03 16:39:11,085 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2021-05-03 16:39:11,337 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 16:39:11,733 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2021-05-03 16:39:12,174 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2021-05-03 16:39:12,377 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2021-05-03 16:39:12,563 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-03 16:39:12,750 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 16:39:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:12,945 INFO L93 Difference]: Finished difference Result 2524 states and 7752 transitions. [2021-05-03 16:39:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:39:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:39:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:12,949 INFO L225 Difference]: With dead ends: 2524 [2021-05-03 16:39:12,949 INFO L226 Difference]: Without dead ends: 2479 [2021-05-03 16:39:12,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 5424.5ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 16:39:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-05-03 16:39:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1393. [2021-05-03 16:39:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 3.317528735632184) internal successors, (4618), 1392 states have internal predecessors, (4618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:12,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4618 transitions. [2021-05-03 16:39:12,970 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4618 transitions. Word has length 26 [2021-05-03 16:39:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:12,970 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 4618 transitions. [2021-05-03 16:39:12,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4618 transitions. [2021-05-03 16:39:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:12,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:12,972 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 16:39:13,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-05-03 16:39:13,173 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:13,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:13,173 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-05-03 16:39:13,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:13,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364186567] [2021-05-03 16:39:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:13,387 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 16:39:13,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364186567] [2021-05-03 16:39:13,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285926406] [2021-05-03 16:39:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:39:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:39:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:13,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:39:13,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:13,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:13,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,833 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:39:13,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:13,841 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:39:13,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:13,853 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:39:13,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:39:13,865 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:13,872 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:13,878 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:39:13,884 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:39:13,890 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:13,895 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:13,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:13,898 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:13,917 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:39:13,918 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 16:39:13,918 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:39:13,942 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 16:39:13,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:13,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:39:13,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397715444] [2021-05-03 16:39:13,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:39:13,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:13,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:39:13,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:39:13,943 INFO L87 Difference]: Start difference. First operand 1393 states and 4618 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 16:39:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:15,119 INFO L93 Difference]: Finished difference Result 1965 states and 6287 transitions. [2021-05-03 16:39:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:39:15,120 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 16:39:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:15,123 INFO L225 Difference]: With dead ends: 1965 [2021-05-03 16:39:15,123 INFO L226 Difference]: Without dead ends: 1935 [2021-05-03 16:39:15,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1107.6ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:39:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-05-03 16:39:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1434. [2021-05-03 16:39:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 3.319609211444522) internal successors, (4757), 1433 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 4757 transitions. [2021-05-03 16:39:15,143 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 4757 transitions. Word has length 26 [2021-05-03 16:39:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:15,143 INFO L480 AbstractCegarLoop]: Abstraction has 1434 states and 4757 transitions. [2021-05-03 16:39:15,143 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 16:39:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 4757 transitions. [2021-05-03 16:39:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:15,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:15,145 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 16:39:15,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:15,346 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:15,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-05-03 16:39:15,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:15,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267324198] [2021-05-03 16:39:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:15,660 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 16:39:15,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267324198] [2021-05-03 16:39:15,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566980563] [2021-05-03 16:39:15,660 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 16:39:15,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:39:15,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:15,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:39:15,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:16,025 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:39:16,260 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_9, A, v_prenex_13, v_prenex_11, v_prenex_7], 3=[v_prenex_19, v_prenex_17, v_prenex_15]} [2021-05-03 16:39:16,288 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:39:16,288 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:39:16,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:16,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:16,312 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 35 treesize of output 35 [2021-05-03 16:39:16,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:16,680 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 133 [2021-05-03 16:39:16,681 INFO L628 ElimStorePlain]: treesize reduction 151, result has 71.7 percent of original size [2021-05-03 16:39:16,704 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:39:16,704 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 28 treesize of output 24 [2021-05-03 16:39:16,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:16,871 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-05-03 16:39:16,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:16,896 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:39:16,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:39:16,898 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,076 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-03 16:39:17,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:17,103 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:39:17,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:39:17,115 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,268 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 16:39:17,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:17,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:17,288 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:39:17,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,300 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:39:17,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:17,301 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,548 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-05-03 16:39:17,548 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.4 percent of original size [2021-05-03 16:39:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:17,570 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-05-03 16:39:17,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-05-03 16:39:17,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,702 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 16:39:17,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:17,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:17,723 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:39:17,723 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-05-03 16:39:17,727 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,859 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 16:39:17,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:17,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-05-03 16:39:17,880 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:17,996 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-03 16:39:17,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:18,017 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 16:39:18,017 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:565, output treesize:421 [2021-05-03 16:39:18,282 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-05-03 16:39:18,403 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 16:39:18,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:18,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:39:18,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248284452] [2021-05-03 16:39:18,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:18,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:18,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:18,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:18,404 INFO L87 Difference]: Start difference. First operand 1434 states and 4757 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 16:39:19,362 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-05-03 16:39:19,549 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-05-03 16:39:19,695 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2021-05-03 16:39:19,985 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2021-05-03 16:39:20,250 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-03 16:39:20,409 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:39:20,597 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:39:20,758 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-05-03 16:39:20,956 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-05-03 16:39:21,130 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 36 [2021-05-03 16:39:21,564 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-05-03 16:39:22,074 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 77 [2021-05-03 16:39:22,323 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2021-05-03 16:39:22,571 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-05-03 16:39:22,821 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-05-03 16:39:23,354 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-05-03 16:39:23,872 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2021-05-03 16:39:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:24,141 INFO L93 Difference]: Finished difference Result 2396 states and 7465 transitions. [2021-05-03 16:39:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:39:24,141 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 16:39:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:24,145 INFO L225 Difference]: With dead ends: 2396 [2021-05-03 16:39:24,145 INFO L226 Difference]: Without dead ends: 2351 [2021-05-03 16:39:24,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 5549.1ms TimeCoverageRelationStatistics Valid=443, Invalid=2313, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 16:39:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-03 16:39:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1453. [2021-05-03 16:39:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.3236914600550964) internal successors, (4826), 1452 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4826 transitions. [2021-05-03 16:39:24,167 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4826 transitions. Word has length 26 [2021-05-03 16:39:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:24,167 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4826 transitions. [2021-05-03 16:39:24,167 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 16:39:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4826 transitions. [2021-05-03 16:39:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:24,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:24,169 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 16:39:24,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-05-03 16:39:24,370 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-05-03 16:39:24,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:24,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048350377] [2021-05-03 16:39:24,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:24,619 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 16:39:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048350377] [2021-05-03 16:39:24,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915088344] [2021-05-03 16:39:24,619 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 16:39:24,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:39:24,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:39:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:25,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:39:25,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:25,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:25,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:25,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:25,152 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,158 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 28 treesize of output 16 [2021-05-03 16:39:25,159 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:39:25,166 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:39:25,172 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:39:25,179 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,186 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 30 treesize of output 16 [2021-05-03 16:39:25,186 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:39:25,193 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:25,199 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:39:25,206 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:25,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:25,209 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 26 treesize of output 13 [2021-05-03 16:39:25,211 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:25,234 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:39:25,235 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 16:39:25,236 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:39:25,261 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 16:39:25,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:25,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:39:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680300515] [2021-05-03 16:39:25,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:39:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:39:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:39:25,262 INFO L87 Difference]: Start difference. First operand 1453 states and 4826 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 16:39:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:26,617 INFO L93 Difference]: Finished difference Result 2267 states and 7232 transitions. [2021-05-03 16:39:26,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:39:26,617 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 16:39:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:26,620 INFO L225 Difference]: With dead ends: 2267 [2021-05-03 16:39:26,620 INFO L226 Difference]: Without dead ends: 2252 [2021-05-03 16:39:26,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1390.8ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:39:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-05-03 16:39:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 1468. [2021-05-03 16:39:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3231083844580778) internal successors, (4875), 1467 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4875 transitions. [2021-05-03 16:39:26,641 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4875 transitions. Word has length 26 [2021-05-03 16:39:26,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:26,642 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4875 transitions. [2021-05-03 16:39:26,642 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 16:39:26,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4875 transitions. [2021-05-03 16:39:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:26,644 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:26,644 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 16:39:26,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:26,844 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:26,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:26,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 10 times [2021-05-03 16:39:26,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:26,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35355947] [2021-05-03 16:39:26,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:27,066 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 16:39:27,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35355947] [2021-05-03 16:39:27,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019226139] [2021-05-03 16:39:27,066 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 16:39:27,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:39:27,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:27,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:39:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:27,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,453 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:27,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,468 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:27,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:27,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,482 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:27,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:39:27,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,497 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:27,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:39:27,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,513 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:39:27,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:27,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:27,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,545 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-05-03 16:39:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 19 [2021-05-03 16:39:27,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,557 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:27,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,568 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:27,569 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,578 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:27,579 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,588 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:27,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,599 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:39:27,600 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,609 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,609 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 33 treesize of output 19 [2021-05-03 16:39:27,610 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:27,619 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,627 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:27,628 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:27,633 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:27,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:39:27,634 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:27,741 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 16:39:27,741 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-05-03 16:39:27,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:39:27,743 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:91 [2021-05-03 16:39:27,836 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 16:39:27,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:27,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:39:27,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417623060] [2021-05-03 16:39:27,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:39:27,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:27,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:39:27,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:39:27,837 INFO L87 Difference]: Start difference. First operand 1468 states and 4875 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 16:39:29,116 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-05-03 16:39:29,424 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-05-03 16:39:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:29,575 INFO L93 Difference]: Finished difference Result 2259 states and 7312 transitions. [2021-05-03 16:39:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:39:29,575 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 16:39:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:29,578 INFO L225 Difference]: With dead ends: 2259 [2021-05-03 16:39:29,579 INFO L226 Difference]: Without dead ends: 2244 [2021-05-03 16:39:29,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1574.6ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:39:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-05-03 16:39:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1468. [2021-05-03 16:39:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3231083844580778) internal successors, (4875), 1467 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4875 transitions. [2021-05-03 16:39:29,599 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4875 transitions. Word has length 26 [2021-05-03 16:39:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:29,599 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4875 transitions. [2021-05-03 16:39:29,599 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 16:39:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4875 transitions. [2021-05-03 16:39:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:29,601 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:29,601 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 16:39:29,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:29,802 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-05-03 16:39:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:29,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130813009] [2021-05-03 16:39:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:29,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:30,113 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 16:39:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130813009] [2021-05-03 16:39:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553003308] [2021-05-03 16:39:30,114 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 16:39:30,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:39:30,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:30,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:39:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:30,531 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:39:30,787 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-05-03 16:39:30,856 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_29, v_prenex_28]} [2021-05-03 16:39:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:30,860 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 16:39:30,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:30,984 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-05-03 16:39:30,984 INFO L628 ElimStorePlain]: treesize reduction 50, result has 70.1 percent of original size [2021-05-03 16:39:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:30,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:30,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:30,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:31,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:31,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:31,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:31,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:39:31,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:31,051 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 16:39:31,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:31,100 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-05-03 16:39:31,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:39:31,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:181, output treesize:32 [2021-05-03 16:39:31,146 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 16:39:31,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:31,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:39:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815487389] [2021-05-03 16:39:31,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:31,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:31,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:31,147 INFO L87 Difference]: Start difference. First operand 1468 states and 4875 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 16:39:32,018 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 16:39:32,174 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-05-03 16:39:32,453 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-05-03 16:39:33,037 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:39:33,473 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-05-03 16:39:33,702 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-05-03 16:39:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:34,037 INFO L93 Difference]: Finished difference Result 2357 states and 7501 transitions. [2021-05-03 16:39:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:39:34,038 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 16:39:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:34,041 INFO L225 Difference]: With dead ends: 2357 [2021-05-03 16:39:34,041 INFO L226 Difference]: Without dead ends: 2312 [2021-05-03 16:39:34,042 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 3022.4ms TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 16:39:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-05-03 16:39:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1490. [2021-05-03 16:39:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.333109469442579) internal successors, (4963), 1489 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 4963 transitions. [2021-05-03 16:39:34,062 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 4963 transitions. Word has length 26 [2021-05-03 16:39:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:34,062 INFO L480 AbstractCegarLoop]: Abstraction has 1490 states and 4963 transitions. [2021-05-03 16:39:34,062 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 16:39:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 4963 transitions. [2021-05-03 16:39:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:34,064 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:34,064 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 16:39:34,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-05-03 16:39:34,278 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:34,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-05-03 16:39:34,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:34,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023164795] [2021-05-03 16:39:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:34,588 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 16:39:34,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023164795] [2021-05-03 16:39:34,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645375866] [2021-05-03 16:39:34,589 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 16:39:34,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:39:34,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:39:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:34,962 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:39:35,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:35,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,442 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-05-03 16:39:35,443 INFO L628 ElimStorePlain]: treesize reduction 120, result has 75.1 percent of original size [2021-05-03 16:39:35,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 16:39:35,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,609 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:39:35,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:39:35,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:35,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:39:35,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:35,910 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-05-03 16:39:35,910 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.2 percent of original size [2021-05-03 16:39:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:35,924 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:35,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:39:35,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:36,048 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:39:36,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:36,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:39:36,069 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:36,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:36,080 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:39:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:39:36,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:36,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:36,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:39:36,193 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:36,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:36,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:36,297 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 16:39:36,298 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:36,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:36,399 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:39:36,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:36,401 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:36,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:36,492 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 16:39:36,492 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-05-03 16:39:36,630 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 16:39:36,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:36,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:39:36,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61564084] [2021-05-03 16:39:36,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:39:36,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:36,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:39:36,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:39:36,631 INFO L87 Difference]: Start difference. First operand 1490 states and 4963 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 16:39:38,120 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:39:38,284 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:39:38,607 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-05-03 16:39:38,979 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-05-03 16:39:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:39,217 INFO L93 Difference]: Finished difference Result 2596 states and 8270 transitions. [2021-05-03 16:39:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:39:39,218 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 16:39:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:39,222 INFO L225 Difference]: With dead ends: 2596 [2021-05-03 16:39:39,222 INFO L226 Difference]: Without dead ends: 2566 [2021-05-03 16:39:39,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2528.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1282, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:39:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2021-05-03 16:39:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 1488. [2021-05-03 16:39:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 3.3375924680564895) internal successors, (4963), 1487 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 4963 transitions. [2021-05-03 16:39:39,243 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 4963 transitions. Word has length 26 [2021-05-03 16:39:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:39,243 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 4963 transitions. [2021-05-03 16:39:39,243 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 16:39:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 4963 transitions. [2021-05-03 16:39:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:39,245 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:39,245 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 16:39:39,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:39:39,446 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:39,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:39,446 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-05-03 16:39:39,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:39,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517824606] [2021-05-03 16:39:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:39,765 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 16:39:39,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517824606] [2021-05-03 16:39:39,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883978425] [2021-05-03 16:39:39,765 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 16:39:39,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:39:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:39:39,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:40,127 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:39:40,346 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-05-03 16:39:40,708 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 83 [2021-05-03 16:39:40,888 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_61, v_prenex_65], 6=[A, v_prenex_63]} [2021-05-03 16:39:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:40,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:40,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:40,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:41,046 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-05-03 16:39:41,047 INFO L628 ElimStorePlain]: treesize reduction 151, result has 44.9 percent of original size [2021-05-03 16:39:41,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:41,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:39:41,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:41,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:41,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:41,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:41,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:41,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:41,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:39:41,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:41,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:41,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:39:41,207 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:29 [2021-05-03 16:39:41,255 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 16:39:41,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:41,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:39:41,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979226987] [2021-05-03 16:39:41,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:41,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:41,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:41,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:41,256 INFO L87 Difference]: Start difference. First operand 1488 states and 4963 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 16:39:41,725 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-05-03 16:39:42,287 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-05-03 16:39:42,607 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-05-03 16:39:43,081 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-05-03 16:39:43,399 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-05-03 16:39:43,692 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-05-03 16:39:43,966 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-05-03 16:39:44,418 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-05-03 16:39:44,610 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:39:45,456 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 143 [2021-05-03 16:39:45,619 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:39:45,820 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 16:39:46,606 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 118 [2021-05-03 16:39:46,997 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 105 [2021-05-03 16:39:47,712 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 89 [2021-05-03 16:39:48,225 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 64 [2021-05-03 16:39:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:48,591 INFO L93 Difference]: Finished difference Result 3872 states and 11939 transitions. [2021-05-03 16:39:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:39:48,591 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 16:39:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:48,597 INFO L225 Difference]: With dead ends: 3872 [2021-05-03 16:39:48,597 INFO L226 Difference]: Without dead ends: 3722 [2021-05-03 16:39:48,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 7108.3ms TimeCoverageRelationStatistics Valid=761, Invalid=3661, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 16:39:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-05-03 16:39:48,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 1557. [2021-05-03 16:39:48,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3425449871465296) internal successors, (5201), 1556 states have internal predecessors, (5201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5201 transitions. [2021-05-03 16:39:48,625 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5201 transitions. Word has length 26 [2021-05-03 16:39:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:48,625 INFO L480 AbstractCegarLoop]: Abstraction has 1557 states and 5201 transitions. [2021-05-03 16:39:48,625 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 16:39:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5201 transitions. [2021-05-03 16:39:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:48,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:48,627 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 16:39:48,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-05-03 16:39:48,842 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:48,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:48,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-05-03 16:39:48,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:48,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36646556] [2021-05-03 16:39:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:49,151 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 16:39:49,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36646556] [2021-05-03 16:39:49,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929073059] [2021-05-03 16:39:49,152 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 16:39:49,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:39:49,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:49,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:39:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:39:49,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:49,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:39:49,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:39:49,874 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:49,884 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,893 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,902 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,910 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 16:39:49,911 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,920 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:49,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:39:49,937 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:49,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:39:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:39:49,942 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:49,966 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:39:49,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:39:49,967 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:39:50,001 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 16:39:50,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:50,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:39:50,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312732343] [2021-05-03 16:39:50,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:50,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:50,002 INFO L87 Difference]: Start difference. First operand 1557 states and 5201 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 16:39:50,485 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-05-03 16:39:50,944 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-03 16:39:51,516 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-05-03 16:39:51,848 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-05-03 16:39:52,208 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-05-03 16:39:52,940 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-05-03 16:39:53,082 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-05-03 16:39:53,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:39:53,323 INFO L93 Difference]: Finished difference Result 3190 states and 10116 transitions. [2021-05-03 16:39:53,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:39:53,324 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 16:39:53,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:39:53,328 INFO L225 Difference]: With dead ends: 3190 [2021-05-03 16:39:53,328 INFO L226 Difference]: Without dead ends: 3103 [2021-05-03 16:39:53,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3113.0ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:39:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3103 states. [2021-05-03 16:39:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3103 to 1572. [2021-05-03 16:39:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.353278166772756) internal successors, (5268), 1571 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:39:53,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5268 transitions. [2021-05-03 16:39:53,354 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5268 transitions. Word has length 26 [2021-05-03 16:39:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:39:53,354 INFO L480 AbstractCegarLoop]: Abstraction has 1572 states and 5268 transitions. [2021-05-03 16:39:53,354 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 16:39:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5268 transitions. [2021-05-03 16:39:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:39:53,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:39:53,356 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 16:39:53,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-05-03 16:39:53,557 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:39:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:39:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-05-03 16:39:53,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:39:53,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410009455] [2021-05-03 16:39:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:39:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:39:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:39:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410009455] [2021-05-03 16:39:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826760217] [2021-05-03 16:39:53,963 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 16:39:53,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:39:53,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:39:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:39:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:39:54,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,582 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:39:54,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-05-03 16:39:54,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,606 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,638 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:39:54,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-05-03 16:39:54,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,661 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,681 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,701 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,702 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,731 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-05-03 16:39:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-05-03 16:39:54,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:39:54,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,796 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-05-03 16:39:54,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,799 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,819 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:39:54,820 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,845 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:39:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-05-03 16:39:54,847 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,865 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,866 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,881 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:39:54,882 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,898 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:39:54,899 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,916 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:39:54,917 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:39:54,927 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:39:54,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:39:54,928 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:39:55,022 INFO L628 ElimStorePlain]: treesize reduction 27, result has 77.5 percent of original size [2021-05-03 16:39:55,024 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 16:39:55,024 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-05-03 16:39:55,123 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 16:39:55,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:39:55,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:39:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601554494] [2021-05-03 16:39:55,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:39:55,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:39:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:39:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:39:55,124 INFO L87 Difference]: Start difference. First operand 1572 states and 5268 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 16:39:55,456 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-05-03 16:39:55,741 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:39:55,863 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-05-03 16:39:56,273 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-05-03 16:39:57,018 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-05-03 16:39:57,439 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-05-03 16:39:57,867 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-05-03 16:39:58,337 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 16:39:58,843 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-05-03 16:39:59,200 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-05-03 16:39:59,422 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-05-03 16:39:59,780 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-05-03 16:40:00,066 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 16:40:00,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:00,588 INFO L93 Difference]: Finished difference Result 3625 states and 11364 transitions. [2021-05-03 16:40:00,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 16:40:00,589 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 16:40:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:00,594 INFO L225 Difference]: With dead ends: 3625 [2021-05-03 16:40:00,594 INFO L226 Difference]: Without dead ends: 3537 [2021-05-03 16:40:00,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 4925.4ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:40:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-05-03 16:40:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 1585. [2021-05-03 16:40:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.359848484848485) internal successors, (5322), 1584 states have internal predecessors, (5322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5322 transitions. [2021-05-03 16:40:00,623 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5322 transitions. Word has length 26 [2021-05-03 16:40:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:00,623 INFO L480 AbstractCegarLoop]: Abstraction has 1585 states and 5322 transitions. [2021-05-03 16:40:00,623 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 16:40:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5322 transitions. [2021-05-03 16:40:00,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:00,626 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:00,626 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, 1, 1] [2021-05-03 16:40:00,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-05-03 16:40:00,840 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-05-03 16:40:00,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:00,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135082856] [2021-05-03 16:40:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:01,231 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 16:40:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135082856] [2021-05-03 16:40:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407771452] [2021-05-03 16:40:01,232 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 16:40:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:01,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:01,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:01,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:01,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:40:01,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:01,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:01,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:40:01,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:01,965 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-03 16:40:01,966 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.4 percent of original size [2021-05-03 16:40:01,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:01,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:01,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:01,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:02,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:02,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_70 vanished before elimination [2021-05-03 16:40:02,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:02,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:02,010 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 23 treesize of output 13 [2021-05-03 16:40:02,011 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:02,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:02,042 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 16:40:02,042 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:22 [2021-05-03 16:40:02,079 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 16:40:02,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:02,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:40:02,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434122916] [2021-05-03 16:40:02,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:40:02,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:40:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:40:02,080 INFO L87 Difference]: Start difference. First operand 1585 states and 5322 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 16:40:03,051 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-05-03 16:40:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:03,264 INFO L93 Difference]: Finished difference Result 1983 states and 6532 transitions. [2021-05-03 16:40:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:40:03,265 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 16:40:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:03,268 INFO L225 Difference]: With dead ends: 1983 [2021-05-03 16:40:03,268 INFO L226 Difference]: Without dead ends: 1968 [2021-05-03 16:40:03,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1374.5ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:40:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-05-03 16:40:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1602. [2021-05-03 16:40:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 3.3560274828232353) internal successors, (5373), 1601 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 5373 transitions. [2021-05-03 16:40:03,290 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 5373 transitions. Word has length 26 [2021-05-03 16:40:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:03,290 INFO L480 AbstractCegarLoop]: Abstraction has 1602 states and 5373 transitions. [2021-05-03 16:40:03,290 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 16:40:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 5373 transitions. [2021-05-03 16:40:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:03,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:03,293 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 16:40:03,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1003 [2021-05-03 16:40:03,508 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-05-03 16:40:03,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:03,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72828219] [2021-05-03 16:40:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:03,910 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 16:40:03,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72828219] [2021-05-03 16:40:03,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530915779] [2021-05-03 16:40:03,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:40:03,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:40:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:40:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:04,330 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:40:04,580 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_94, A, v_prenex_82, v_prenex_92, v_prenex_80, v_prenex_86, v_prenex_78, v_prenex_90], 3=[v_prenex_76, v_prenex_96, v_prenex_84, v_prenex_88]} [2021-05-03 16:40:04,635 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:40:04,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,079 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 150 [2021-05-03 16:40:05,079 INFO L628 ElimStorePlain]: treesize reduction 128, result has 76.3 percent of original size [2021-05-03 16:40:05,117 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:05,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:40:05,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,304 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 16:40:05,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:05,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,530 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 16:40:05,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,560 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:05,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:40:05,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,748 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-03 16:40:05,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,779 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:05,780 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:40:05,782 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:05,967 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-03 16:40:05,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:05,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:40:05,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:06,182 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-05-03 16:40:06,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,183 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-05-03 16:40:06,210 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:06,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:06,396 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-03 16:40:06,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_76 vanished before elimination [2021-05-03 16:40:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,425 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:40:06,425 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 25 treesize of output 27 [2021-05-03 16:40:06,429 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:06,610 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-05-03 16:40:06,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,636 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-05-03 16:40:06,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 23 [2021-05-03 16:40:06,638 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:06,817 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 16:40:06,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:06,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:06,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-05-03 16:40:06,846 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:07,021 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:40:07,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:07,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:40:07,034 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:557, output treesize:471 [2021-05-03 16:40:07,355 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-05-03 16:40:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:07,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:07,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:40:07,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513730762] [2021-05-03 16:40:07,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:40:07,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:40:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:40:07,472 INFO L87 Difference]: Start difference. First operand 1602 states and 5373 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 16:40:08,511 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-03 16:40:09,003 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-03 16:40:09,142 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 16:40:09,415 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-05-03 16:40:09,592 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:40:09,905 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-05-03 16:40:10,404 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-05-03 16:40:11,079 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2021-05-03 16:40:11,981 WARN L205 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-05-03 16:40:12,254 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-05-03 16:40:12,886 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-05-03 16:40:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:13,258 INFO L93 Difference]: Finished difference Result 2579 states and 8141 transitions. [2021-05-03 16:40:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:40:13,259 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 16:40:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:13,262 INFO L225 Difference]: With dead ends: 2579 [2021-05-03 16:40:13,262 INFO L226 Difference]: Without dead ends: 2519 [2021-05-03 16:40:13,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 5748.5ms TimeCoverageRelationStatistics Valid=332, Invalid=1924, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:40:13,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-05-03 16:40:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1590. [2021-05-03 16:40:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.355569540591567) internal successors, (5332), 1589 states have internal predecessors, (5332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5332 transitions. [2021-05-03 16:40:13,285 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5332 transitions. Word has length 26 [2021-05-03 16:40:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:13,285 INFO L480 AbstractCegarLoop]: Abstraction has 1590 states and 5332 transitions. [2021-05-03 16:40:13,285 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 16:40:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5332 transitions. [2021-05-03 16:40:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:13,288 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:13,288 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 16:40:13,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-05-03 16:40:13,489 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:13,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-05-03 16:40:13,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:13,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243348217] [2021-05-03 16:40:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:13,837 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 16:40:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243348217] [2021-05-03 16:40:13,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853541360] [2021-05-03 16:40:13,838 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 16:40:13,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:40:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:40:13,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:14,356 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:14,356 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:40:14,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,378 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,378 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 28 treesize of output 16 [2021-05-03 16:40:14,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,406 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:14,407 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,433 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:14,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,467 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:14,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:40:14,470 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,490 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-05-03 16:40:14,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-05-03 16:40:14,492 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,507 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,508 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:14,509 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:14,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:14,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,557 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:14,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,573 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:40:14,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,588 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:14,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,601 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:14,602 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,612 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:14,613 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,637 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:14,642 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,662 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-05-03 16:40:14,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2021-05-03 16:40:14,663 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,671 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:14,671 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:14,672 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:14,827 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 16:40:14,828 INFO L628 ElimStorePlain]: treesize reduction 35, result has 82.3 percent of original size [2021-05-03 16:40:14,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:40:14,830 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-05-03 16:40:14,966 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 16:40:15,000 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 16:40:15,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:15,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:40:15,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038010113] [2021-05-03 16:40:15,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:40:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:40:15,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:15,001 INFO L87 Difference]: Start difference. First operand 1590 states and 5332 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 16:40:16,109 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-05-03 16:40:16,286 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-05-03 16:40:16,475 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-05-03 16:40:16,903 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-05-03 16:40:17,030 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 16:40:17,361 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-05-03 16:40:17,522 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 16:40:17,660 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 16:40:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:18,230 INFO L93 Difference]: Finished difference Result 2323 states and 7556 transitions. [2021-05-03 16:40:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:40:18,231 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 16:40:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:18,234 INFO L225 Difference]: With dead ends: 2323 [2021-05-03 16:40:18,234 INFO L226 Difference]: Without dead ends: 2308 [2021-05-03 16:40:18,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2997.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:40:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-05-03 16:40:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1582. [2021-05-03 16:40:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.3630613535736877) internal successors, (5317), 1581 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5317 transitions. [2021-05-03 16:40:18,257 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5317 transitions. Word has length 26 [2021-05-03 16:40:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:18,258 INFO L480 AbstractCegarLoop]: Abstraction has 1582 states and 5317 transitions. [2021-05-03 16:40:18,258 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 16:40:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5317 transitions. [2021-05-03 16:40:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:18,260 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:18,260 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 16:40:18,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-05-03 16:40:18,473 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-05-03 16:40:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:18,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047115636] [2021-05-03 16:40:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:18,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047115636] [2021-05-03 16:40:18,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6805459] [2021-05-03 16:40:18,799 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 16:40:18,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:40:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:19,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:19,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:19,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:40:19,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,305 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 21 treesize of output 13 [2021-05-03 16:40:19,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:40:19,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:40:19,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:19,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:19,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:40:19,362 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,372 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 28 treesize of output 16 [2021-05-03 16:40:19,373 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:40:19,383 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:19,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,400 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 28 treesize of output 16 [2021-05-03 16:40:19,401 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:19,408 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:19,413 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:19,441 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:40:19,443 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 16:40:19,443 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:40:19,479 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 16:40:19,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:19,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:40:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464587127] [2021-05-03 16:40:19,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:40:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:40:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:40:19,480 INFO L87 Difference]: Start difference. First operand 1582 states and 5317 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 16:40:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:20,044 INFO L93 Difference]: Finished difference Result 1917 states and 6354 transitions. [2021-05-03 16:40:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:40:20,044 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 16:40:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:20,047 INFO L225 Difference]: With dead ends: 1917 [2021-05-03 16:40:20,047 INFO L226 Difference]: Without dead ends: 1902 [2021-05-03 16:40:20,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:20,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-05-03 16:40:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1594. [2021-05-03 16:40:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.3659761456371626) internal successors, (5362), 1593 states have internal predecessors, (5362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:20,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5362 transitions. [2021-05-03 16:40:20,079 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5362 transitions. Word has length 26 [2021-05-03 16:40:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:20,079 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 5362 transitions. [2021-05-03 16:40:20,079 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 16:40:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5362 transitions. [2021-05-03 16:40:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:20,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:20,082 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 16:40:20,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1107,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:20,296 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash -871608925, now seen corresponding path program 17 times [2021-05-03 16:40:20,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:20,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610901900] [2021-05-03 16:40:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:20,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610901900] [2021-05-03 16:40:20,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314323382] [2021-05-03 16:40:20,641 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 16:40:20,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:40:20,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:20,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,093 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:21,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,106 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:21,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:21,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:40:21,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:21,154 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 30 treesize of output 24 [2021-05-03 16:40:21,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:21,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:21,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,192 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:21,194 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,206 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:21,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,218 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:21,219 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,232 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,232 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 33 treesize of output 19 [2021-05-03 16:40:21,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:21,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:40:21,251 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,263 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:21,264 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,278 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-05-03 16:40:21,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 19 [2021-05-03 16:40:21,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,289 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:21,290 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,300 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:21,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,313 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:21,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:40:21,315 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:21,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:21,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:40:21,323 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:21,451 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 16:40:21,452 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.5 percent of original size [2021-05-03 16:40:21,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:40:21,454 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:91 [2021-05-03 16:40:21,568 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 16:40:21,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:21,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:40:21,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184326648] [2021-05-03 16:40:21,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:40:21,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:40:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:40:21,569 INFO L87 Difference]: Start difference. First operand 1594 states and 5362 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 16:40:22,071 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-05-03 16:40:22,210 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2021-05-03 16:40:22,722 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 16:40:22,945 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-03 16:40:23,079 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 16:40:23,329 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-03 16:40:23,623 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-05-03 16:40:24,008 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-05-03 16:40:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:24,232 INFO L93 Difference]: Finished difference Result 2518 states and 8191 transitions. [2021-05-03 16:40:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:40:24,233 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 16:40:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:24,237 INFO L225 Difference]: With dead ends: 2518 [2021-05-03 16:40:24,237 INFO L226 Difference]: Without dead ends: 2488 [2021-05-03 16:40:24,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2532.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:40:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-05-03 16:40:24,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1595. [2021-05-03 16:40:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.3676286072772896) internal successors, (5368), 1594 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5368 transitions. [2021-05-03 16:40:24,259 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5368 transitions. Word has length 26 [2021-05-03 16:40:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:24,259 INFO L480 AbstractCegarLoop]: Abstraction has 1595 states and 5368 transitions. [2021-05-03 16:40:24,260 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 16:40:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5368 transitions. [2021-05-03 16:40:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:24,262 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:24,262 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 16:40:24,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-05-03 16:40:24,471 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 18 times [2021-05-03 16:40:24,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:24,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304732960] [2021-05-03 16:40:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:24,714 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-05-03 16:40:24,868 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-05-03 16:40:25,142 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 16:40:25,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304732960] [2021-05-03 16:40:25,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89012799] [2021-05-03 16:40:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:40:25,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:40:25,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:25,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:25,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,450 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:25,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:25,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:25,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,480 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:25,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:40:25,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:25,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:40:25,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,530 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:25,530 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 35 treesize of output 23 [2021-05-03 16:40:25,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,541 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:25,542 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,554 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,555 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 33 treesize of output 19 [2021-05-03 16:40:25,556 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,569 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:40:25,570 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,586 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:25,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-05-03 16:40:25,588 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,603 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:25,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:40:25,605 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,616 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:40:25,617 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,629 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:40:25,630 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,639 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,640 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 28 treesize of output 16 [2021-05-03 16:40:25,641 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:25,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:25,661 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:40:25,663 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:25,769 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 16:40:25,770 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-05-03 16:40:25,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:40:25,771 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-05-03 16:40:25,876 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 16:40:25,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:25,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:40:25,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557693499] [2021-05-03 16:40:25,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:40:25,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:25,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:40:25,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:25,877 INFO L87 Difference]: Start difference. First operand 1595 states and 5368 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 16:40:26,640 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 31 [2021-05-03 16:40:26,986 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-05-03 16:40:27,189 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-05-03 16:40:27,404 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-05-03 16:40:27,586 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-05-03 16:40:28,144 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-05-03 16:40:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:28,269 INFO L93 Difference]: Finished difference Result 2232 states and 7334 transitions. [2021-05-03 16:40:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:40:28,270 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 16:40:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:28,273 INFO L225 Difference]: With dead ends: 2232 [2021-05-03 16:40:28,273 INFO L226 Difference]: Without dead ends: 2217 [2021-05-03 16:40:28,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2632.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:40:28,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-05-03 16:40:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1591. [2021-05-03 16:40:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3660377358490567) internal successors, (5352), 1590 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:28,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5352 transitions. [2021-05-03 16:40:28,296 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5352 transitions. Word has length 26 [2021-05-03 16:40:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:28,296 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5352 transitions. [2021-05-03 16:40:28,296 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 16:40:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5352 transitions. [2021-05-03 16:40:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:28,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:28,298 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 16:40:28,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:28,498 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:28,499 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-05-03 16:40:28,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:28,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380552191] [2021-05-03 16:40:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:28,745 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 16:40:28,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380552191] [2021-05-03 16:40:28,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944860983] [2021-05-03 16:40:28,746 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 16:40:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:28,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:28,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:29,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:29,464 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 21 treesize of output 13 [2021-05-03 16:40:29,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:29,593 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-03 16:40:29,594 INFO L628 ElimStorePlain]: treesize reduction 130, result has 44.0 percent of original size [2021-05-03 16:40:29,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:40:29,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:29,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:29,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:29,642 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 16:40:29,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:29,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:29,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:29,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:29,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:40:29,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:29,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:29,717 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 16:40:29,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:22 [2021-05-03 16:40:29,752 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 16:40:29,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:29,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:40:29,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335465176] [2021-05-03 16:40:29,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:40:29,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:29,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:40:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:40:29,753 INFO L87 Difference]: Start difference. First operand 1591 states and 5352 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 16:40:30,614 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-05-03 16:40:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:30,724 INFO L93 Difference]: Finished difference Result 2054 states and 6752 transitions. [2021-05-03 16:40:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:40:30,725 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 16:40:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:30,728 INFO L225 Difference]: With dead ends: 2054 [2021-05-03 16:40:30,728 INFO L226 Difference]: Without dead ends: 2033 [2021-05-03 16:40:30,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1281.4ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:40:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-05-03 16:40:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1632. [2021-05-03 16:40:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3623543838136114) internal successors, (5484), 1631 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5484 transitions. [2021-05-03 16:40:30,749 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5484 transitions. Word has length 26 [2021-05-03 16:40:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:30,749 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5484 transitions. [2021-05-03 16:40:30,749 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 16:40:30,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5484 transitions. [2021-05-03 16:40:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:30,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:30,751 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 16:40:30,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1215 [2021-05-03 16:40:30,957 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:30,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:30,957 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-05-03 16:40:30,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:30,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400520570] [2021-05-03 16:40:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:31,238 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 16:40:31,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400520570] [2021-05-03 16:40:31,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345121813] [2021-05-03 16:40:31,239 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 16:40:31,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:40:31,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:40:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:31,658 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:31,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,671 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,671 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:31,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,685 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:31,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,712 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:31,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:40:31,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,739 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:31,739 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 21 treesize of output 21 [2021-05-03 16:40:31,741 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,769 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:31,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:40:31,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,803 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:31,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:40:31,805 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:31,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:40:31,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,848 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-05-03 16:40:31,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-05-03 16:40:31,850 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,862 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:31,863 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,874 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:31,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,892 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,892 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:40:31,893 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,908 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:31,909 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,920 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:31,921 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,932 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:40:31,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:31,933 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:31,960 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-05-03 16:40:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2021-05-03 16:40:31,962 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:32,201 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 16:40:32,201 INFO L628 ElimStorePlain]: treesize reduction 37, result has 80.3 percent of original size [2021-05-03 16:40:32,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:40:32,204 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:177 [2021-05-03 16:40:32,452 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 26 [2021-05-03 16:40:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:32,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:32,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 16:40:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231690657] [2021-05-03 16:40:32,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:40:32,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:40:32,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:40:32,499 INFO L87 Difference]: Start difference. First operand 1632 states and 5484 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 16:40:33,524 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:40:34,075 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-05-03 16:40:34,230 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 16:40:34,559 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-05-03 16:40:34,703 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 16:40:34,867 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 16:40:35,118 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-03 16:40:35,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:35,520 INFO L93 Difference]: Finished difference Result 2172 states and 7045 transitions. [2021-05-03 16:40:35,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:40:35,521 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 16:40:35,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:35,524 INFO L225 Difference]: With dead ends: 2172 [2021-05-03 16:40:35,524 INFO L226 Difference]: Without dead ends: 2147 [2021-05-03 16:40:35,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 3035.4ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:40:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-05-03 16:40:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1628. [2021-05-03 16:40:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 3.3761524277811925) internal successors, (5493), 1627 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 16:40:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5493 transitions. [2021-05-03 16:40:35,545 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5493 transitions. Word has length 26 [2021-05-03 16:40:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:35,545 INFO L480 AbstractCegarLoop]: Abstraction has 1628 states and 5493 transitions. [2021-05-03 16:40:35,545 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 16:40:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5493 transitions. [2021-05-03 16:40:35,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:35,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:35,547 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 16:40:35,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-05-03 16:40:35,748 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:35,748 INFO L82 PathProgramCache]: Analyzing trace with hash 638446221, now seen corresponding path program 21 times [2021-05-03 16:40:35,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:35,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180401122] [2021-05-03 16:40:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:36,014 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 16:40:36,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180401122] [2021-05-03 16:40:36,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967752981] [2021-05-03 16:40:36,015 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 16:40:36,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:40:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:36,495 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:36,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:40:36,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:36,523 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:36,524 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 30 treesize of output 28 [2021-05-03 16:40:36,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:36,700 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 16:40:36,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:36,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:36,727 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:36,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:40:36,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:36,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:36,748 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:40:36,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:36,914 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:40:36,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:36,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:36,945 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:36,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:36,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:36,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:36,969 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:40:36,972 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:37,112 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:40:37,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:37,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:37,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:37,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:37,136 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:37,157 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:37,158 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:40:37,162 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:37,304 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:40:37,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:37,320 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 16:40:37,320 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:329, output treesize:220 [2021-05-03 16:40:37,481 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:40:37,550 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 16:40:37,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:37,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:40:37,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525883883] [2021-05-03 16:40:37,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:40:37,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:37,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:40:37,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:37,551 INFO L87 Difference]: Start difference. First operand 1628 states and 5493 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 16:40:38,194 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-05-03 16:40:38,970 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:40:39,248 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-05-03 16:40:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:39,466 INFO L93 Difference]: Finished difference Result 2262 states and 7406 transitions. [2021-05-03 16:40:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:40:39,466 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 16:40:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:39,470 INFO L225 Difference]: With dead ends: 2262 [2021-05-03 16:40:39,470 INFO L226 Difference]: Without dead ends: 2233 [2021-05-03 16:40:39,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2092.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:40:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-05-03 16:40:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1649. [2021-05-03 16:40:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.370752427184466) internal successors, (5555), 1648 states have internal predecessors, (5555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5555 transitions. [2021-05-03 16:40:39,490 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5555 transitions. Word has length 26 [2021-05-03 16:40:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:39,490 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 5555 transitions. [2021-05-03 16:40:39,490 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 16:40:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5555 transitions. [2021-05-03 16:40:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:39,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:39,492 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 16:40:39,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:39,693 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-05-03 16:40:39,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:39,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499915090] [2021-05-03 16:40:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:39,927 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 16:40:40,069 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-05-03 16:40:40,182 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 16:40:40,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499915090] [2021-05-03 16:40:40,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013304313] [2021-05-03 16:40:40,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:40:40,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:40:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:40,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:40,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:40,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:40,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:40:40,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:40,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:40,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:40,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:40:40,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:40,678 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-05-03 16:40:40,679 INFO L628 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2021-05-03 16:40:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:40,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:40,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:40:40,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:40,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:40,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:40,718 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 16:40:40,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:40,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:40,746 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-05-03 16:40:40,748 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 16:40:40,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:29 [2021-05-03 16:40:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:40,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:40,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:40:40,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75277664] [2021-05-03 16:40:40,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:40:40,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:40:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:40:40,800 INFO L87 Difference]: Start difference. First operand 1649 states and 5555 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 16:40:41,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:41,333 INFO L93 Difference]: Finished difference Result 1772 states and 5890 transitions. [2021-05-03 16:40:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:40:41,334 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 16:40:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:41,337 INFO L225 Difference]: With dead ends: 1772 [2021-05-03 16:40:41,337 INFO L226 Difference]: Without dead ends: 1757 [2021-05-03 16:40:41,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:40:41,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-05-03 16:40:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1655. [2021-05-03 16:40:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1654 states have (on average 3.3724304715840385) internal successors, (5578), 1654 states have internal predecessors, (5578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:41,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 5578 transitions. [2021-05-03 16:40:41,358 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 5578 transitions. Word has length 26 [2021-05-03 16:40:41,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:41,358 INFO L480 AbstractCegarLoop]: Abstraction has 1655 states and 5578 transitions. [2021-05-03 16:40:41,358 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 16:40:41,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 5578 transitions. [2021-05-03 16:40:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:41,360 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:41,360 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 16:40:41,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1319,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:41,563 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:41,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-05-03 16:40:41,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:41,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901259684] [2021-05-03 16:40:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:41,855 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 16:40:41,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901259684] [2021-05-03 16:40:41,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500736449] [2021-05-03 16:40:41,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:41,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:40:41,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:41,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:40:41,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:42,433 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:42,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:42,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:42,460 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:42,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:42,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:42,635 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:40:42,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:42,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:42,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:42,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:42,689 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:42,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:42,865 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 16:40:42,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:42,893 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:42,894 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:40:42,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:42,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:42,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:42,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:40:42,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:43,074 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:40:43,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:43,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:43,103 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:40:43,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:43,130 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:43,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:40:43,132 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:43,260 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:40:43,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:43,286 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 16:40:43,286 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:220 [2021-05-03 16:40:43,441 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:40:43,500 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 16:40:43,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:43,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:40:43,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714082479] [2021-05-03 16:40:43,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:40:43,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:43,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:40:43,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:40:43,501 INFO L87 Difference]: Start difference. First operand 1655 states and 5578 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 16:40:44,007 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-05-03 16:40:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:45,257 INFO L93 Difference]: Finished difference Result 2360 states and 7691 transitions. [2021-05-03 16:40:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:40:45,258 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 16:40:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:45,262 INFO L225 Difference]: With dead ends: 2360 [2021-05-03 16:40:45,262 INFO L226 Difference]: Without dead ends: 2310 [2021-05-03 16:40:45,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1816.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:40:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-03 16:40:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1662. [2021-05-03 16:40:45,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.3762793497892836) internal successors, (5608), 1661 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5608 transitions. [2021-05-03 16:40:45,285 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5608 transitions. Word has length 26 [2021-05-03 16:40:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:45,285 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 5608 transitions. [2021-05-03 16:40:45,285 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 16:40:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5608 transitions. [2021-05-03 16:40:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:45,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:45,287 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 16:40:45,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-05-03 16:40:45,488 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:45,488 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-05-03 16:40:45,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:45,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495916069] [2021-05-03 16:40:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:40:45,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495916069] [2021-05-03 16:40:45,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779352927] [2021-05-03 16:40:45,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:45,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:40:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,213 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:46,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:46,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:46,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,247 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:46,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:46,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:40:46,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:46,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:46,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:46,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-05-03 16:40:46,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,327 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:40:46,328 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:40:46,343 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:40:46,359 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:46,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-05-03 16:40:46,377 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,394 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:46,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:46,396 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,410 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:40:46,411 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,425 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:40:46,426 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:46,440 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,451 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:40:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:40:46,452 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:46,462 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:40:46,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:46,465 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:46,610 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 16:40:46,610 INFO L628 ElimStorePlain]: treesize reduction 16, result has 85.6 percent of original size [2021-05-03 16:40:46,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:40:46,611 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:95 [2021-05-03 16:40:46,729 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 16:40:46,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:46,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:40:46,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403792899] [2021-05-03 16:40:46,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:40:46,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:46,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:40:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:46,730 INFO L87 Difference]: Start difference. First operand 1662 states and 5608 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 16:40:48,276 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 16:40:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:48,410 INFO L93 Difference]: Finished difference Result 2236 states and 7365 transitions. [2021-05-03 16:40:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:40:48,411 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 16:40:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:48,415 INFO L225 Difference]: With dead ends: 2236 [2021-05-03 16:40:48,416 INFO L226 Difference]: Without dead ends: 2202 [2021-05-03 16:40:48,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1853.1ms TimeCoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:40:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-05-03 16:40:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1685. [2021-05-03 16:40:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 3.3818289786223277) internal successors, (5695), 1684 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 5695 transitions. [2021-05-03 16:40:48,454 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 5695 transitions. Word has length 26 [2021-05-03 16:40:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:48,454 INFO L480 AbstractCegarLoop]: Abstraction has 1685 states and 5695 transitions. [2021-05-03 16:40:48,454 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 16:40:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 5695 transitions. [2021-05-03 16:40:48,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:48,457 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:48,457 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 16:40:48,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1394 [2021-05-03 16:40:48,658 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-05-03 16:40:48,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:48,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119972176] [2021-05-03 16:40:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:49,052 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 16:40:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119972176] [2021-05-03 16:40:49,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530687856] [2021-05-03 16:40:49,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:40:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:49,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:49,508 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-03 16:40:49,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:49,844 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:49,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:49,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:49,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:49,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:49,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:50,346 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-05-03 16:40:50,347 INFO L628 ElimStorePlain]: treesize reduction 24, result has 94.5 percent of original size [2021-05-03 16:40:50,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:50,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:40:50,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,409 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:40:50,411 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:50,856 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-05-03 16:40:50,856 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.7 percent of original size [2021-05-03 16:40:50,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,892 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:50,892 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:40:50,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:50,928 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:40:50,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:40:50,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:51,143 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 16:40:51,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:51,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:51,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:40:51,180 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,206 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:40:51,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:51,619 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-03 16:40:51,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 95.8 percent of original size [2021-05-03 16:40:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,647 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:40:51,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:51,649 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:51,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:40:51,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:52,031 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-05-03 16:40:52,032 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-05-03 16:40:52,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:40:52,053 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:247 [2021-05-03 16:40:52,219 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-05-03 16:40:52,284 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 16:40:52,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:52,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:40:52,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669598451] [2021-05-03 16:40:52,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:40:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:40:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:40:52,285 INFO L87 Difference]: Start difference. First operand 1685 states and 5695 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 16:40:52,652 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 16:40:53,488 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-05-03 16:40:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:53,728 INFO L93 Difference]: Finished difference Result 2338 states and 7678 transitions. [2021-05-03 16:40:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:40:53,728 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 16:40:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:53,733 INFO L225 Difference]: With dead ends: 2338 [2021-05-03 16:40:53,733 INFO L226 Difference]: Without dead ends: 2292 [2021-05-03 16:40:53,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1901.0ms TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:40:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-05-03 16:40:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1706. [2021-05-03 16:40:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1705 states have (on average 3.38475073313783) internal successors, (5771), 1705 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 5771 transitions. [2021-05-03 16:40:53,760 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 5771 transitions. Word has length 26 [2021-05-03 16:40:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:53,760 INFO L480 AbstractCegarLoop]: Abstraction has 1706 states and 5771 transitions. [2021-05-03 16:40:53,761 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 16:40:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 5771 transitions. [2021-05-03 16:40:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:53,763 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:53,763 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 16:40:53,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-05-03 16:40:53,964 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:53,964 INFO L82 PathProgramCache]: Analyzing trace with hash -39476015, now seen corresponding path program 42 times [2021-05-03 16:40:53,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:53,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244548184] [2021-05-03 16:40:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:54,406 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 16:40:54,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244548184] [2021-05-03 16:40:54,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006782230] [2021-05-03 16:40:54,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:54,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:40:54,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:40:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:40:54,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:55,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,058 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 34 treesize of output 16 [2021-05-03 16:40:55,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,070 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 16:40:55,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,080 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 32 treesize of output 16 [2021-05-03 16:40:55,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:40:55,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:40:55,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,113 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 39 treesize of output 16 [2021-05-03 16:40:55,114 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:40:55,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:40:55,139 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:40:55,152 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:40:55,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:40:55,173 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:40:55,184 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:40:55,195 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:40:55,206 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:55,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:55,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:40:55,213 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:55,241 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:40:55,243 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 16:40:55,243 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:40:55,275 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 16:40:55,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:55,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:40:55,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975715292] [2021-05-03 16:40:55,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:40:55,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:55,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:40:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:40:55,276 INFO L87 Difference]: Start difference. First operand 1706 states and 5771 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 16:40:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:40:56,456 INFO L93 Difference]: Finished difference Result 2169 states and 7149 transitions. [2021-05-03 16:40:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:40:56,456 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 16:40:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:40:56,460 INFO L225 Difference]: With dead ends: 2169 [2021-05-03 16:40:56,460 INFO L226 Difference]: Without dead ends: 2143 [2021-05-03 16:40:56,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1277.2ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:40:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-05-03 16:40:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1710. [2021-05-03 16:40:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.382679929783499) internal successors, (5781), 1709 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:40:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5781 transitions. [2021-05-03 16:40:56,491 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5781 transitions. Word has length 26 [2021-05-03 16:40:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:40:56,491 INFO L480 AbstractCegarLoop]: Abstraction has 1710 states and 5781 transitions. [2021-05-03 16:40:56,491 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 16:40:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5781 transitions. [2021-05-03 16:40:56,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:40:56,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:40:56,494 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 16:40:56,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:56,695 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:40:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:40:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-05-03 16:40:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:40:56,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215600181] [2021-05-03 16:40:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:40:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:57,110 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 16:40:57,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215600181] [2021-05-03 16:40:57,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690512248] [2021-05-03 16:40:57,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:40:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:40:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:40:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:40:57,494 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:40:57,557 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_141, v_prenex_143], 5=[A, v_prenex_139]} [2021-05-03 16:40:57,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:57,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:57,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:40:57,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:57,575 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 23 treesize of output 13 [2021-05-03 16:40:57,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,706 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 16:40:57,706 INFO L628 ElimStorePlain]: treesize reduction 141, result has 44.5 percent of original size [2021-05-03 16:40:57,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 16:40:57,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:57,753 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:40:57,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:40:57,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:40:57,790 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 29 treesize of output 13 [2021-05-03 16:40:57,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:40:57,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:40:57,819 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 16:40:57,819 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:32 [2021-05-03 16:40:57,866 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 16:40:57,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:40:57,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:40:57,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624419512] [2021-05-03 16:40:57,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:40:57,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:40:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:40:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:40:57,867 INFO L87 Difference]: Start difference. First operand 1710 states and 5781 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 16:41:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:00,026 INFO L93 Difference]: Finished difference Result 2394 states and 7875 transitions. [2021-05-03 16:41:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:41:00,027 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 16:41:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:00,030 INFO L225 Difference]: With dead ends: 2394 [2021-05-03 16:41:00,030 INFO L226 Difference]: Without dead ends: 2379 [2021-05-03 16:41:00,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2321.4ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:41:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2021-05-03 16:41:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1716. [2021-05-03 16:41:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.3842565597667638) internal successors, (5804), 1715 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5804 transitions. [2021-05-03 16:41:00,051 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5804 transitions. Word has length 26 [2021-05-03 16:41:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:00,051 INFO L480 AbstractCegarLoop]: Abstraction has 1716 states and 5804 transitions. [2021-05-03 16:41:00,051 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 16:41:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5804 transitions. [2021-05-03 16:41:00,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:00,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:00,053 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 16:41:00,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1580,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:00,254 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-05-03 16:41:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:00,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95959822] [2021-05-03 16:41:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:00,470 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-05-03 16:41:00,666 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-05-03 16:41:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:41:00,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95959822] [2021-05-03 16:41:00,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557709145] [2021-05-03 16:41:00,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:00,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:41:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:00,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:41:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:41:01,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,189 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:01,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:41:01,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,202 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:01,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:01,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:41:01,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,229 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:41:01,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,246 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:01,249 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:01,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:41:01,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:41:01,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,295 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:41:01,297 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:01,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:01,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:41:01,329 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,341 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:41:01,342 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,358 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:01,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:01,360 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,370 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:01,372 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,388 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:01,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-05-03 16:41:01,390 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:01,399 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:41:01,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:41:01,400 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:01,507 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-03 16:41:01,508 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-05-03 16:41:01,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:41:01,509 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-05-03 16:41:01,632 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 16:41:01,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:01,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:41:01,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633192744] [2021-05-03 16:41:01,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:41:01,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:01,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:41:01,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:41:01,633 INFO L87 Difference]: Start difference. First operand 1716 states and 5804 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 16:41:01,993 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2021-05-03 16:41:02,171 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 16:41:02,606 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-05-03 16:41:02,801 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 16:41:02,991 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 16:41:03,132 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 16:41:03,443 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-05-03 16:41:03,840 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:41:04,198 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 16:41:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:04,480 INFO L93 Difference]: Finished difference Result 2362 states and 7709 transitions. [2021-05-03 16:41:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:41:04,481 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 16:41:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:04,485 INFO L225 Difference]: With dead ends: 2362 [2021-05-03 16:41:04,485 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 16:41:04,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2883.1ms TimeCoverageRelationStatistics Valid=282, Invalid=1278, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:41:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 16:41:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1733. [2021-05-03 16:41:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 3.3804849884526558) internal successors, (5855), 1732 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 16:41:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 5855 transitions. [2021-05-03 16:41:04,510 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 5855 transitions. Word has length 26 [2021-05-03 16:41:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:04,510 INFO L480 AbstractCegarLoop]: Abstraction has 1733 states and 5855 transitions. [2021-05-03 16:41:04,511 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 16:41:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 5855 transitions. [2021-05-03 16:41:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:04,513 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:04,513 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 16:41:04,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1594 [2021-05-03 16:41:04,713 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:04,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash -492577331, now seen corresponding path program 44 times [2021-05-03 16:41:04,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:04,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336778810] [2021-05-03 16:41:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:05,075 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 16:41:05,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336778810] [2021-05-03 16:41:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055700043] [2021-05-03 16:41:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:05,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:41:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:41:05,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:41:05,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,784 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:41:05,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:41:05,805 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:41:05,815 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,824 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:05,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:05,844 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:41:05,854 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,863 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:05,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:05,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:05,870 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:05,899 INFO L628 ElimStorePlain]: treesize reduction 13, result has 61.8 percent of original size [2021-05-03 16:41:05,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:41:05,900 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:41:05,934 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 16:41:05,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:05,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:41:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845076352] [2021-05-03 16:41:05,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:41:05,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:41:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:41:05,935 INFO L87 Difference]: Start difference. First operand 1733 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 16:41:07,833 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-05-03 16:41:08,701 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-05-03 16:41:08,867 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-05-03 16:41:09,009 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-05-03 16:41:09,490 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-03 16:41:09,686 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-05-03 16:41:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:10,044 INFO L93 Difference]: Finished difference Result 2502 states and 8102 transitions. [2021-05-03 16:41:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:41:10,045 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 16:41:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:10,049 INFO L225 Difference]: With dead ends: 2502 [2021-05-03 16:41:10,049 INFO L226 Difference]: Without dead ends: 2480 [2021-05-03 16:41:10,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 3644.1ms TimeCoverageRelationStatistics Valid=568, Invalid=2738, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:41:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-05-03 16:41:10,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 1738. [2021-05-03 16:41:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 3.3811168681635) internal successors, (5873), 1737 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:10,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5873 transitions. [2021-05-03 16:41:10,071 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5873 transitions. Word has length 26 [2021-05-03 16:41:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:10,071 INFO L480 AbstractCegarLoop]: Abstraction has 1738 states and 5873 transitions. [2021-05-03 16:41:10,071 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 16:41:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5873 transitions. [2021-05-03 16:41:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:10,073 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:10,073 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 16:41:10,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1613 [2021-05-03 16:41:10,274 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 45 times [2021-05-03 16:41:10,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:10,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731952070] [2021-05-03 16:41:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:10,571 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 16:41:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731952070] [2021-05-03 16:41:10,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372689548] [2021-05-03 16:41:10,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:10,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:41:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:10,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:41:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:11,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 45 [2021-05-03 16:41:11,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,452 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 16:41:11,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:41:11,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,492 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-05-03 16:41:11,492 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 28 treesize of output 24 [2021-05-03 16:41:11,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,540 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:41:11,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:11,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,572 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:41:11,573 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,610 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:41:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:11,612 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,647 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-05-03 16:41:11,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:11,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,670 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:11,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,706 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-05-03 16:41:11,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 25 [2021-05-03 16:41:11,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:11,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 16:41:11,755 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,780 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:11,781 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,804 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:41:11,805 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,843 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-05-03 16:41:11,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-05-03 16:41:11,844 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,870 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:41:11,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,894 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:11,895 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:11,909 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:11,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:11,910 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:12,055 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-05-03 16:41:12,055 INFO L628 ElimStorePlain]: treesize reduction 151, result has 43.9 percent of original size [2021-05-03 16:41:12,057 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 16:41:12,057 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:133 [2021-05-03 16:41:12,187 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-05-03 16:41:12,242 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 16:41:12,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:12,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 16:41:12,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342819172] [2021-05-03 16:41:12,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:41:12,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:41:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:41:12,243 INFO L87 Difference]: Start difference. First operand 1738 states and 5873 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 16:41:12,805 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-05-03 16:41:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:15,372 INFO L93 Difference]: Finished difference Result 3171 states and 10208 transitions. [2021-05-03 16:41:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 16:41:15,373 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 16:41:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:15,377 INFO L225 Difference]: With dead ends: 3171 [2021-05-03 16:41:15,377 INFO L226 Difference]: Without dead ends: 3141 [2021-05-03 16:41:15,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2927.4ms TimeCoverageRelationStatistics Valid=495, Invalid=2475, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:41:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2021-05-03 16:41:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 1793. [2021-05-03 16:41:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.390625) internal successors, (6076), 1792 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6076 transitions. [2021-05-03 16:41:15,405 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6076 transitions. Word has length 26 [2021-05-03 16:41:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:15,405 INFO L480 AbstractCegarLoop]: Abstraction has 1793 states and 6076 transitions. [2021-05-03 16:41:15,405 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 16:41:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6076 transitions. [2021-05-03 16:41:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:15,407 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:15,407 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 16:41:15,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:15,621 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:15,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 46 times [2021-05-03 16:41:15,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:15,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495192275] [2021-05-03 16:41:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:15,921 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 16:41:15,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495192275] [2021-05-03 16:41:15,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107206234] [2021-05-03 16:41:15,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:15,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:41:15,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:41:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:16,555 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 47 [2021-05-03 16:41:16,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,600 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:41:16,601 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 28 treesize of output 30 [2021-05-03 16:41:16,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,642 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:41:16,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:16,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,664 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:16,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,686 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:16,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,707 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:16,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,743 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:41:16,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:41:16,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,769 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-05-03 16:41:16,770 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,790 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:16,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,811 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:16,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,830 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:41:16,831 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,851 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:41:16,852 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,871 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-05-03 16:41:16,872 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,895 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:16,897 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,918 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:41:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:16,920 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:16,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:16,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:16,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-05-03 16:41:16,953 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:17,059 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-05-03 16:41:17,060 INFO L628 ElimStorePlain]: treesize reduction 28, result has 74.3 percent of original size [2021-05-03 16:41:17,063 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 16:41:17,063 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-05-03 16:41:17,205 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 16:41:17,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:17,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:41:17,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352755857] [2021-05-03 16:41:17,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:41:17,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:17,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:41:17,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:41:17,206 INFO L87 Difference]: Start difference. First operand 1793 states and 6076 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 16:41:17,524 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-05-03 16:41:18,273 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:41:18,965 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-05-03 16:41:19,570 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 16:41:19,857 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 16:41:20,718 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-05-03 16:41:21,013 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-05-03 16:41:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:21,308 INFO L93 Difference]: Finished difference Result 3903 states and 12422 transitions. [2021-05-03 16:41:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:41:21,309 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 16:41:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:21,315 INFO L225 Difference]: With dead ends: 3903 [2021-05-03 16:41:21,315 INFO L226 Difference]: Without dead ends: 3846 [2021-05-03 16:41:21,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3499.3ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:41:21,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-05-03 16:41:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 1921. [2021-05-03 16:41:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 3.4088541666666665) internal successors, (6545), 1920 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 6545 transitions. [2021-05-03 16:41:21,348 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 6545 transitions. Word has length 26 [2021-05-03 16:41:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:21,348 INFO L480 AbstractCegarLoop]: Abstraction has 1921 states and 6545 transitions. [2021-05-03 16:41:21,348 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 16:41:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 6545 transitions. [2021-05-03 16:41:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:21,350 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:21,350 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 16:41:21,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:21,551 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-05-03 16:41:21,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:21,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595777988] [2021-05-03 16:41:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:21,849 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-05-03 16:41:21,969 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 16:41:22,061 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 16:41:22,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595777988] [2021-05-03 16:41:22,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255110200] [2021-05-03 16:41:22,061 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 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 16:41:22,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:41:22,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:22,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:41:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:22,663 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:41:22,946 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:41:23,171 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:41:23,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:41:23,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:23,186 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:41:23,186 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:41:23,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:23,725 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-05-03 16:41:23,726 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-05-03 16:41:23,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:41:23,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:23,785 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:41:23,785 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 30 treesize of output 1 [2021-05-03 16:41:23,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:23,999 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 16:41:23,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:24,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:24,022 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:41:24,031 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:24,265 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-03 16:41:24,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:24,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:24,298 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:41:24,302 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:24,316 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:41:24,316 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:41:24,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:24,695 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 112 [2021-05-03 16:41:24,696 INFO L628 ElimStorePlain]: treesize reduction 23, result has 93.1 percent of original size [2021-05-03 16:41:24,729 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:41:24,729 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:41:24,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:24,916 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-05-03 16:41:24,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:24,945 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:41:24,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:24,948 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:25,128 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:41:25,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:25,158 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:41:25,158 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:41:25,163 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:25,341 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:41:25,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:25,370 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:41:25,370 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 28 treesize of output 24 [2021-05-03 16:41:25,372 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:25,529 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 16:41:25,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:25,539 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 16:41:25,540 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:563, output treesize:331 [2021-05-03 16:41:25,810 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-03 16:41:25,875 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 16:41:25,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:25,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:41:25,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459485047] [2021-05-03 16:41:25,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:41:25,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:41:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:41:25,876 INFO L87 Difference]: Start difference. First operand 1921 states and 6545 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 16:41:26,407 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-05-03 16:41:26,643 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-05-03 16:41:27,041 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-03 16:41:27,430 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 16:41:27,757 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:41:28,092 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-05-03 16:41:28,313 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 16:41:28,624 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:41:29,094 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-05-03 16:41:29,863 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 102 [2021-05-03 16:41:30,216 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 72 [2021-05-03 16:41:30,944 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2021-05-03 16:41:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:31,221 INFO L93 Difference]: Finished difference Result 2697 states and 8826 transitions. [2021-05-03 16:41:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:41:31,222 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 16:41:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:31,225 INFO L225 Difference]: With dead ends: 2697 [2021-05-03 16:41:31,225 INFO L226 Difference]: Without dead ends: 2652 [2021-05-03 16:41:31,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 5706.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1678, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 16:41:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-05-03 16:41:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1953. [2021-05-03 16:41:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.4123975409836067) internal successors, (6661), 1952 states have internal predecessors, (6661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6661 transitions. [2021-05-03 16:41:31,254 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6661 transitions. Word has length 26 [2021-05-03 16:41:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:31,254 INFO L480 AbstractCegarLoop]: Abstraction has 1953 states and 6661 transitions. [2021-05-03 16:41:31,254 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 16:41:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6661 transitions. [2021-05-03 16:41:31,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:31,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:31,257 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 16:41:31,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1908,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:31,457 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-05-03 16:41:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:31,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271277136] [2021-05-03 16:41:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:31,755 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-05-03 16:41:31,879 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 16:41:31,947 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 16:41:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271277136] [2021-05-03 16:41:31,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371821882] [2021-05-03 16:41:31,948 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 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 16:41:31,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:41:31,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:41:31,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:32,453 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:41:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:32,658 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:41:32,658 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:41:32,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:32,678 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:41:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:32,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:33,213 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 156 [2021-05-03 16:41:33,214 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-05-03 16:41:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:33,255 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:41:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:41:33,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:33,499 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-05-03 16:41:33,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:33,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:33,534 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:41:33,535 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:41:33,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:33,802 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-05-03 16:41:33,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:33,840 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:41:33,841 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:41:33,842 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:33,876 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:41:33,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:41:33,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:34,374 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 139 [2021-05-03 16:41:34,375 INFO L628 ElimStorePlain]: treesize reduction 31, result has 91.7 percent of original size [2021-05-03 16:41:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:34,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:34,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:34,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:34,877 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-05-03 16:41:34,878 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-05-03 16:41:34,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:34,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:34,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:34,923 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:35,123 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-03 16:41:35,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:35,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:35,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:41:35,160 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:35,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:35,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:35,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:41:35,194 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:35,534 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 115 [2021-05-03 16:41:35,535 INFO L628 ElimStorePlain]: treesize reduction 46, result has 84.2 percent of original size [2021-05-03 16:41:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:35,568 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:41:35,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:41:35,571 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:35,729 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-03 16:41:35,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:35,754 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 16:41:35,754 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-05-03 16:41:36,049 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-05-03 16:41:36,106 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 16:41:36,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:36,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:41:36,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402068484] [2021-05-03 16:41:36,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:41:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:36,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:41:36,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:41:36,107 INFO L87 Difference]: Start difference. First operand 1953 states and 6661 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 16:41:36,650 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2021-05-03 16:41:37,691 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:41:37,975 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:41:38,534 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:41:38,780 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 16:41:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:39,149 INFO L93 Difference]: Finished difference Result 2994 states and 9857 transitions. [2021-05-03 16:41:39,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:41:39,150 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 16:41:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:39,155 INFO L225 Difference]: With dead ends: 2994 [2021-05-03 16:41:39,155 INFO L226 Difference]: Without dead ends: 2960 [2021-05-03 16:41:39,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3223.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:41:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-05-03 16:41:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 1950. [2021-05-03 16:41:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.414571575166752) internal successors, (6655), 1949 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6655 transitions. [2021-05-03 16:41:39,184 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6655 transitions. Word has length 26 [2021-05-03 16:41:39,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:39,184 INFO L480 AbstractCegarLoop]: Abstraction has 1950 states and 6655 transitions. [2021-05-03 16:41:39,184 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 16:41:39,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6655 transitions. [2021-05-03 16:41:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:39,187 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:39,187 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 16:41:39,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1944 [2021-05-03 16:41:39,387 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:39,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:39,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-05-03 16:41:39,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:39,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703939009] [2021-05-03 16:41:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:39,800 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 16:41:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703939009] [2021-05-03 16:41:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041438787] [2021-05-03 16:41:39,800 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 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 16:41:39,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:41:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:41:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:40,352 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-05-03 16:41:40,541 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_190, A, v_prenex_187, v_prenex_188], 3=[v_prenex_186]} [2021-05-03 16:41:40,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:40,566 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:40,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:41:40,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:40,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:40,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:41:40,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,092 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-05-03 16:41:41,093 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.4 percent of original size [2021-05-03 16:41:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:41:41,120 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,137 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:41,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:41:41,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,402 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:41:41,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:41:41,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,443 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:41,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:41:41,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,630 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:41:41,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:41:41,655 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,671 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:41:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:41:41,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,847 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:41:41,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:41:41,869 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:41,883 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:41:41,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:41:41,885 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:42,039 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:41:42,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:42,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:41:42,045 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:185 [2021-05-03 16:41:42,237 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 16:41:42,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:42,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:41:42,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235408410] [2021-05-03 16:41:42,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:41:42,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:42,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:41:42,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:41:42,238 INFO L87 Difference]: Start difference. First operand 1950 states and 6655 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 16:41:43,455 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 16:41:43,895 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2021-05-03 16:41:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:44,339 INFO L93 Difference]: Finished difference Result 2625 states and 8728 transitions. [2021-05-03 16:41:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:41:44,340 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 16:41:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:44,344 INFO L225 Difference]: With dead ends: 2625 [2021-05-03 16:41:44,344 INFO L226 Difference]: Without dead ends: 2579 [2021-05-03 16:41:44,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2312.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:41:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-05-03 16:41:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1950. [2021-05-03 16:41:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.414571575166752) internal successors, (6655), 1949 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6655 transitions. [2021-05-03 16:41:44,368 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6655 transitions. Word has length 26 [2021-05-03 16:41:44,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:44,368 INFO L480 AbstractCegarLoop]: Abstraction has 1950 states and 6655 transitions. [2021-05-03 16:41:44,368 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 16:41:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6655 transitions. [2021-05-03 16:41:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:44,370 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:44,370 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 16:41:44,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1989,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:44,571 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 47 times [2021-05-03 16:41:44,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:44,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273655296] [2021-05-03 16:41:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:45,050 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 16:41:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273655296] [2021-05-03 16:41:45,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412269207] [2021-05-03 16:41:45,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:41:45,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:41:45,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:41:45,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:45,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:41:45,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:45,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,827 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:45,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,868 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 41 treesize of output 16 [2021-05-03 16:41:45,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,883 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:45,895 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,907 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 33 treesize of output 13 [2021-05-03 16:41:45,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,926 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,937 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 28 treesize of output 13 [2021-05-03 16:41:45,938 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,948 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 34 treesize of output 16 [2021-05-03 16:41:45,949 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:45,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:45,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:45,955 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:45,989 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:41:45,991 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 16:41:45,991 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:41:46,031 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 16:41:46,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:46,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:41:46,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889429424] [2021-05-03 16:41:46,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:41:46,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:41:46,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:41:46,032 INFO L87 Difference]: Start difference. First operand 1950 states and 6655 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 16:41:46,644 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-05-03 16:41:46,933 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 16:41:47,883 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 16:41:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:48,607 INFO L93 Difference]: Finished difference Result 2429 states and 8077 transitions. [2021-05-03 16:41:48,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:41:48,608 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 16:41:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:48,611 INFO L225 Difference]: With dead ends: 2429 [2021-05-03 16:41:48,612 INFO L226 Difference]: Without dead ends: 2407 [2021-05-03 16:41:48,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2478.3ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:41:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-05-03 16:41:48,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1946. [2021-05-03 16:41:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 3.413367609254499) internal successors, (6639), 1945 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 6639 transitions. [2021-05-03 16:41:48,634 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 6639 transitions. Word has length 26 [2021-05-03 16:41:48,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:48,635 INFO L480 AbstractCegarLoop]: Abstraction has 1946 states and 6639 transitions. [2021-05-03 16:41:48,635 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 16:41:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 6639 transitions. [2021-05-03 16:41:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:48,637 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:48,637 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 16:41:48,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2026 [2021-05-03 16:41:48,837 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 48 times [2021-05-03 16:41:48,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:48,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752090517] [2021-05-03 16:41:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:49,055 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-03 16:41:49,218 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:41:49,439 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 16:41:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752090517] [2021-05-03 16:41:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087508911] [2021-05-03 16:41:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:49,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:41:49,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:49,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:41:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:49,879 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 16:41:49,973 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_193], 5=[v_prenex_191, v_prenex_195]} [2021-05-03 16:41:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:49,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:49,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:49,985 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 13 [2021-05-03 16:41:49,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:49,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:49,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:49,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:41:50,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:50,132 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 16:41:50,132 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-05-03 16:41:50,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-05-03 16:41:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:50,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:41:50,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:50,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:50,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:50,185 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:41:50,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:50,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:50,218 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 16:41:50,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-05-03 16:41:50,281 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 16:41:50,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:50,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:41:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448807338] [2021-05-03 16:41:50,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:41:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:41:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:41:50,282 INFO L87 Difference]: Start difference. First operand 1946 states and 6639 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 16:41:52,465 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-05-03 16:41:52,784 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 16:41:53,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:53,238 INFO L93 Difference]: Finished difference Result 2677 states and 8873 transitions. [2021-05-03 16:41:53,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:41:53,239 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 16:41:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:53,243 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:41:53,243 INFO L226 Difference]: Without dead ends: 2662 [2021-05-03 16:41:53,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2926.5ms TimeCoverageRelationStatistics Valid=440, Invalid=1722, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:41:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-05-03 16:41:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1946. [2021-05-03 16:41:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 3.413367609254499) internal successors, (6639), 1945 states have internal predecessors, (6639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 6639 transitions. [2021-05-03 16:41:53,272 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 6639 transitions. Word has length 26 [2021-05-03 16:41:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:53,272 INFO L480 AbstractCegarLoop]: Abstraction has 1946 states and 6639 transitions. [2021-05-03 16:41:53,273 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 16:41:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 6639 transitions. [2021-05-03 16:41:53,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:53,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:53,275 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 16:41:53,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2116 [2021-05-03 16:41:53,476 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:53,476 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 49 times [2021-05-03 16:41:53,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:53,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929967603] [2021-05-03 16:41:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:53,956 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 16:41:53,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929967603] [2021-05-03 16:41:53,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502714754] [2021-05-03 16:41:53,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:53,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:41:53,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:54,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:54,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:41:54,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:54,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:54,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:54,881 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:54,894 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,908 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 41 treesize of output 16 [2021-05-03 16:41:54,910 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:41:54,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:41:54,943 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,957 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 30 treesize of output 16 [2021-05-03 16:41:54,959 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,971 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 35 treesize of output 19 [2021-05-03 16:41:54,972 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:41:54,986 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:54,997 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 16:41:55,000 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:55,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:55,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:55,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:55,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:55,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:55,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:41:55,014 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:55,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:55,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:55,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:41:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:55,021 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:55,056 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:41:55,058 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 16:41:55,058 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:41:55,103 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 16:41:55,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:41:55,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:41:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538923880] [2021-05-03 16:41:55,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:41:55,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:41:55,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:41:55,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:41:55,104 INFO L87 Difference]: Start difference. First operand 1946 states and 6639 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 16:41:56,160 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-03 16:41:56,353 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:41:56,844 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 16:41:58,025 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:41:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:41:58,783 INFO L93 Difference]: Finished difference Result 3062 states and 10015 transitions. [2021-05-03 16:41:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:41:58,784 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 16:41:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:41:58,789 INFO L225 Difference]: With dead ends: 3062 [2021-05-03 16:41:58,789 INFO L226 Difference]: Without dead ends: 3026 [2021-05-03 16:41:58,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 3302.3ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 16:41:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-05-03 16:41:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2026. [2021-05-03 16:41:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.4024691358024692) internal successors, (6890), 2025 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:41:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 6890 transitions. [2021-05-03 16:41:58,819 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 6890 transitions. Word has length 26 [2021-05-03 16:41:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:41:58,819 INFO L480 AbstractCegarLoop]: Abstraction has 2026 states and 6890 transitions. [2021-05-03 16:41:58,819 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 16:41:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 6890 transitions. [2021-05-03 16:41:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:41:58,822 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:41:58,822 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 16:41:59,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2130,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:59,022 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:41:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:41:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1306035039, now seen corresponding path program 50 times [2021-05-03 16:41:59,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:41:59,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862333843] [2021-05-03 16:41:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:41:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:41:59,421 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 16:41:59,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862333843] [2021-05-03 16:41:59,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39380142] [2021-05-03 16:41:59,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:41:59,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:41:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:41:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:41:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:41:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,819 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 16:41:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-05-03 16:41:59,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:41:59,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 16:41:59,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,919 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-05-03 16:41:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:59,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:59,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,949 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:41:59,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:41:59,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:41:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:41:59,991 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-05-03 16:41:59,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:41:59,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,022 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:00,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,051 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:00,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,080 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:42:00,082 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,125 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:42:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:00,128 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,154 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:42:00,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,191 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 16:42:00,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:42:00,197 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,230 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-05-03 16:42:00,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:42:00,232 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,253 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:42:00,254 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,274 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:42:00,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,295 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:00,296 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:00,307 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:42:00,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:00,308 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:00,422 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 16:42:00,423 INFO L628 ElimStorePlain]: treesize reduction 45, result has 63.4 percent of original size [2021-05-03 16:42:00,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:42:00,424 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:78 [2021-05-03 16:42:00,548 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 16:42:00,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:00,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-05-03 16:42:00,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059086013] [2021-05-03 16:42:00,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:42:00,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:00,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:42:00,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:42:00,549 INFO L87 Difference]: Start difference. First operand 2026 states and 6890 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 16:42:00,917 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-05-03 16:42:01,188 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:42:01,730 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 16:42:01,902 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:42:02,078 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-05-03 16:42:02,276 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-05-03 16:42:02,835 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-05-03 16:42:03,007 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-05-03 16:42:03,146 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-05-03 16:42:03,899 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-05-03 16:42:04,091 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 16:42:05,037 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:42:06,341 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-05-03 16:42:06,646 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-05-03 16:42:06,934 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-05-03 16:42:07,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:07,027 INFO L93 Difference]: Finished difference Result 3611 states and 11523 transitions. [2021-05-03 16:42:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 16:42:07,028 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 16:42:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:07,034 INFO L225 Difference]: With dead ends: 3611 [2021-05-03 16:42:07,034 INFO L226 Difference]: Without dead ends: 3554 [2021-05-03 16:42:07,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 5530.1ms TimeCoverageRelationStatistics Valid=843, Invalid=3579, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 16:42:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3554 states. [2021-05-03 16:42:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3554 to 2039. [2021-05-03 16:42:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.39450441609421) internal successors, (6918), 2038 states have internal predecessors, (6918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6918 transitions. [2021-05-03 16:42:07,064 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6918 transitions. Word has length 26 [2021-05-03 16:42:07,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:07,064 INFO L480 AbstractCegarLoop]: Abstraction has 2039 states and 6918 transitions. [2021-05-03 16:42:07,064 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 16:42:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6918 transitions. [2021-05-03 16:42:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:07,067 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:07,067 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 16:42:07,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2226,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:07,267 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:07,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-05-03 16:42:07,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:07,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609514474] [2021-05-03 16:42:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:07,737 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 16:42:07,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609514474] [2021-05-03 16:42:07,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650244744] [2021-05-03 16:42:07,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:07,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:42:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:42:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:42:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:08,376 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 16:42:09,040 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-05-03 16:42:09,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-05-03 16:42:09,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:09,151 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-05-03 16:42:09,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-05-03 16:42:09,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:09,843 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-05-03 16:42:09,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:09,952 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-05-03 16:42:09,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 51 [2021-05-03 16:42:09,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:10,061 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-05-03 16:42:10,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-05-03 16:42:10,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:12,553 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 177 DAG size of output: 169 [2021-05-03 16:42:12,554 INFO L628 ElimStorePlain]: treesize reduction 41, result has 95.4 percent of original size [2021-05-03 16:42:12,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:12,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-05-03 16:42:12,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:12,781 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-05-03 16:42:12,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 43 [2021-05-03 16:42:12,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:15,238 WARN L205 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 188 DAG size of output: 166 [2021-05-03 16:42:15,239 INFO L628 ElimStorePlain]: treesize reduction 111, result has 88.3 percent of original size [2021-05-03 16:42:15,352 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-05-03 16:42:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2021-05-03 16:42:15,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:15,463 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-05-03 16:42:15,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-05-03 16:42:15,495 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:17,974 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 169 DAG size of output: 158 [2021-05-03 16:42:17,975 INFO L628 ElimStorePlain]: treesize reduction 38, result has 95.6 percent of original size [2021-05-03 16:42:18,077 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-05-03 16:42:18,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 51 [2021-05-03 16:42:18,083 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:18,165 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-05-03 16:42:18,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-05-03 16:42:18,187 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:18,972 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-05-03 16:42:18,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:19,072 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-05-03 16:42:19,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2021-05-03 16:42:19,078 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:19,166 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-05-03 16:42:19,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 56 [2021-05-03 16:42:19,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:20,456 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 148 DAG size of output: 142 [2021-05-03 16:42:20,457 INFO L628 ElimStorePlain]: treesize reduction 63, result has 92.2 percent of original size [2021-05-03 16:42:20,571 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-05-03 16:42:20,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-05-03 16:42:20,587 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:20,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:20,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-05-03 16:42:20,705 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:21,443 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-05-03 16:42:21,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:21,584 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 16:42:21,585 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-05-03 16:42:21,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 59 [2021-05-03 16:42:21,598 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:21,708 INFO L354 Elim1Store]: treesize reduction 4, result has 91.8 percent of original size [2021-05-03 16:42:21,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 63 [2021-05-03 16:42:21,727 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:23,923 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 148 DAG size of output: 138 [2021-05-03 16:42:23,924 INFO L628 ElimStorePlain]: treesize reduction 83, result has 89.6 percent of original size [2021-05-03 16:42:24,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-05-03 16:42:24,038 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:865, output treesize:3942 [2021-05-03 16:42:26,073 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 185 DAG size of output: 90 [2021-05-03 16:42:26,624 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 16:42:26,894 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-05-03 16:42:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:26,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:26,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 16:42:26,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892469154] [2021-05-03 16:42:26,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 16:42:26,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 16:42:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:42:26,954 INFO L87 Difference]: Start difference. First operand 2039 states and 6918 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:27,458 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 27 [2021-05-03 16:42:27,800 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 16:42:28,109 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-05-03 16:42:28,408 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:42:28,579 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-05-03 16:42:29,088 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 38 [2021-05-03 16:42:29,236 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-05-03 16:42:30,019 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:42:30,415 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-05-03 16:42:30,562 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-05-03 16:42:30,747 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 16:42:31,249 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 29 [2021-05-03 16:42:32,702 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2021-05-03 16:42:33,066 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:42:34,506 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 125 DAG size of output: 66 [2021-05-03 16:42:36,352 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-05-03 16:42:37,019 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-05-03 16:42:37,698 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-05-03 16:42:38,419 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 51 [2021-05-03 16:42:39,560 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 113 DAG size of output: 60 [2021-05-03 16:42:41,044 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 98 DAG size of output: 61 [2021-05-03 16:42:41,941 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 43 [2021-05-03 16:42:42,405 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 25 [2021-05-03 16:42:42,925 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 29 [2021-05-03 16:42:43,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:43,076 INFO L93 Difference]: Finished difference Result 3222 states and 10485 transitions. [2021-05-03 16:42:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 16:42:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:42:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:43,083 INFO L225 Difference]: With dead ends: 3222 [2021-05-03 16:42:43,083 INFO L226 Difference]: Without dead ends: 3177 [2021-05-03 16:42:43,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 18012.1ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 16:42:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2021-05-03 16:42:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 2048. [2021-05-03 16:42:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 3.398143624816805) internal successors, (6956), 2047 states have internal predecessors, (6956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 6956 transitions. [2021-05-03 16:42:43,113 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 6956 transitions. Word has length 26 [2021-05-03 16:42:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:43,113 INFO L480 AbstractCegarLoop]: Abstraction has 2048 states and 6956 transitions. [2021-05-03 16:42:43,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:43,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 6956 transitions. [2021-05-03 16:42:43,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:43,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:43,116 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 16:42:43,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2254 [2021-05-03 16:42:43,329 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-05-03 16:42:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:43,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281845028] [2021-05-03 16:42:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:42:43,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281845028] [2021-05-03 16:42:43,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693087484] [2021-05-03 16:42:43,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:43,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:42:43,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:42:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:42:43,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:44,529 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-05-03 16:42:44,808 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_221], 5=[v_prenex_217, v_prenex_219]} [2021-05-03 16:42:44,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:44,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:44,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:42:44,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:45,009 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-05-03 16:42:45,010 INFO L628 ElimStorePlain]: treesize reduction 131, result has 44.5 percent of original size [2021-05-03 16:42:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:45,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:45,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:42:45,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:45,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:45,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:45,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:45,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:42:45,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:45,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:42:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:45,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:42:45,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:45,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:45,187 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 16:42:45,187 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:29 [2021-05-03 16:42:45,262 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 16:42:45,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:42:45,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:42:45,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188502099] [2021-05-03 16:42:45,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:42:45,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:42:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:42:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:42:45,263 INFO L87 Difference]: Start difference. First operand 2048 states and 6956 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 16:42:46,502 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-05-03 16:42:47,185 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-05-03 16:42:47,696 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 16:42:47,925 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-05-03 16:42:48,281 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-05-03 16:42:48,497 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-05-03 16:42:48,848 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-05-03 16:42:49,139 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-05-03 16:42:49,468 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-03 16:42:49,743 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-05-03 16:42:49,891 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-05-03 16:42:50,311 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-03 16:42:50,756 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-05-03 16:42:50,956 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-03 16:42:51,215 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 16:42:51,594 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-05-03 16:42:51,836 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 16:42:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:42:52,086 INFO L93 Difference]: Finished difference Result 2766 states and 9115 transitions. [2021-05-03 16:42:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:42:52,087 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 16:42:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:42:52,091 INFO L225 Difference]: With dead ends: 2766 [2021-05-03 16:42:52,091 INFO L226 Difference]: Without dead ends: 2751 [2021-05-03 16:42:52,092 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 6095.7ms TimeCoverageRelationStatistics Valid=534, Invalid=2658, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 16:42:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-05-03 16:42:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2046. [2021-05-03 16:42:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 3.398044009779951) internal successors, (6949), 2045 states have internal predecessors, (6949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:42:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 6949 transitions. [2021-05-03 16:42:52,116 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 6949 transitions. Word has length 26 [2021-05-03 16:42:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:42:52,116 INFO L480 AbstractCegarLoop]: Abstraction has 2046 states and 6949 transitions. [2021-05-03 16:42:52,116 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 16:42:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 6949 transitions. [2021-05-03 16:42:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:42:52,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:42:52,118 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 16:42:52,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2466 [2021-05-03 16:42:52,319 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:42:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:42:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-05-03 16:42:52,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:42:52,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043742684] [2021-05-03 16:42:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:42:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:42:52,859 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 16:42:52,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043742684] [2021-05-03 16:42:52,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23387340] [2021-05-03 16:42:52,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:42:52,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:42:52,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:42:52,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:42:52,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:42:53,714 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:42:54,024 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-05-03 16:42:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:54,504 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:42:54,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:42:54,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:54,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:54,572 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-05-03 16:42:54,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:54,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:55,246 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-05-03 16:42:55,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:55,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:55,306 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:42:55,306 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 35 treesize of output 35 [2021-05-03 16:42:55,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:55,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:55,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:55,338 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:42:55,338 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 35 treesize of output 1 [2021-05-03 16:42:55,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:55,948 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-03 16:42:55,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:55,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,026 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:42:56,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:42:56,035 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,067 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:42:56,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:42:56,069 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:56,631 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-05-03 16:42:56,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:56,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,684 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:42:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-05-03 16:42:56,687 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:56,732 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:42:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-05-03 16:42:56,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:57,256 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-05-03 16:42:57,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:57,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:57,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-05-03 16:42:57,342 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:57,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:57,394 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:42:57,394 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 39 treesize of output 33 [2021-05-03 16:42:57,400 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:58,927 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 132 DAG size of output: 120 [2021-05-03 16:42:58,928 INFO L628 ElimStorePlain]: treesize reduction 47, result has 91.6 percent of original size [2021-05-03 16:42:58,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:59,007 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:42:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:42:59,011 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:42:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:42:59,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:42:59,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:42:59,085 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:00,031 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 112 [2021-05-03 16:43:00,031 INFO L628 ElimStorePlain]: treesize reduction 33, result has 93.0 percent of original size [2021-05-03 16:43:00,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:00,088 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 23 treesize of output 41 [2021-05-03 16:43:00,101 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:00,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,140 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-05-03 16:43:00,140 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 28 treesize of output 26 [2021-05-03 16:43:00,145 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:00,575 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-05-03 16:43:00,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,659 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-05-03 16:43:00,660 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 33 treesize of output 43 [2021-05-03 16:43:00,668 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:00,721 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:43:00,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-05-03 16:43:00,729 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:01,088 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:43:01,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:01,105 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 16:43:01,106 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:793, output treesize:363 [2021-05-03 16:43:01,332 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 23 [2021-05-03 16:43:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:01,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:01,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 16:43:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406973960] [2021-05-03 16:43:01,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:43:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:01,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:43:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:43:01,403 INFO L87 Difference]: Start difference. First operand 2046 states and 6949 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 16:43:01,930 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-05-03 16:43:02,326 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-03 16:43:02,516 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 24 [2021-05-03 16:43:02,681 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2021-05-03 16:43:03,212 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-05-03 16:43:03,349 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 16:43:03,517 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-05-03 16:43:03,964 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:43:05,660 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-03 16:43:08,238 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-05-03 16:43:09,408 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 169 DAG size of output: 150 [2021-05-03 16:43:09,884 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 16:43:10,673 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 16:43:10,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:10,959 INFO L93 Difference]: Finished difference Result 2908 states and 9598 transitions. [2021-05-03 16:43:10,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:43:10,960 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 16:43:10,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:10,966 INFO L225 Difference]: With dead ends: 2908 [2021-05-03 16:43:10,966 INFO L226 Difference]: Without dead ends: 2878 [2021-05-03 16:43:10,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 9593.1ms TimeCoverageRelationStatistics Valid=544, Invalid=2536, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 16:43:10,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-05-03 16:43:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2058. [2021-05-03 16:43:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 3.3986387943607195) internal successors, (6991), 2057 states have internal predecessors, (6991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 6991 transitions. [2021-05-03 16:43:10,995 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 6991 transitions. Word has length 26 [2021-05-03 16:43:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:10,995 INFO L480 AbstractCegarLoop]: Abstraction has 2058 states and 6991 transitions. [2021-05-03 16:43:10,995 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 16:43:10,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 6991 transitions. [2021-05-03 16:43:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:11,013 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:11,013 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 16:43:11,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2480,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:11,217 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1245974955, now seen corresponding path program 54 times [2021-05-03 16:43:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:11,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026446923] [2021-05-03 16:43:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:11,654 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 16:43:11,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026446923] [2021-05-03 16:43:11,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148007241] [2021-05-03 16:43:11,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:11,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:43:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:43:11,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,191 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-05-03 16:43:12,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 27 [2021-05-03 16:43:12,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,259 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:43:12,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:43:12,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:12,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 45 [2021-05-03 16:43:12,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,421 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-05-03 16:43:12,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 31 [2021-05-03 16:43:12,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,494 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-05-03 16:43:12,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:43:12,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:12,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 45 [2021-05-03 16:43:12,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:43:12,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,697 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:12,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:43:12,699 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,764 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-05-03 16:43:12,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 23 [2021-05-03 16:43:12,767 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,799 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:12,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:43:12,800 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,838 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:12,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:43:12,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,879 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:12,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:43:12,881 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,918 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:12,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:43:12,920 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,980 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-05-03 16:43:12,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-05-03 16:43:12,984 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:13,021 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:13,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:43:13,023 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:13,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:13,045 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:43:13,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:43:13,046 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:13,228 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2021-05-03 16:43:13,228 INFO L628 ElimStorePlain]: treesize reduction 135, result has 33.8 percent of original size [2021-05-03 16:43:13,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:43:13,230 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-05-03 16:43:13,501 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 16:43:13,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:13,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-05-03 16:43:13,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548188822] [2021-05-03 16:43:13,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:43:13,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:13,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:43:13,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:43:13,502 INFO L87 Difference]: Start difference. First operand 2058 states and 6991 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 16:43:13,870 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-03 16:43:14,051 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:43:14,304 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-05-03 16:43:14,747 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 16:43:15,020 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:43:15,218 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-05-03 16:43:15,605 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 16:43:15,889 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-05-03 16:43:16,049 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-05-03 16:43:16,381 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 16:43:16,733 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-05-03 16:43:16,893 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 16:43:17,166 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 16:43:17,655 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-05-03 16:43:17,947 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-03 16:43:18,194 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-05-03 16:43:18,370 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 16:43:18,517 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 16:43:18,752 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-03 16:43:19,007 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-05-03 16:43:19,216 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:43:19,999 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-05-03 16:43:20,238 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-05-03 16:43:20,757 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-05-03 16:43:21,214 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-05-03 16:43:21,753 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-05-03 16:43:21,945 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 16:43:22,312 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-05-03 16:43:22,769 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-05-03 16:43:23,604 WARN L205 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-05-03 16:43:24,126 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-05-03 16:43:24,457 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-05-03 16:43:24,923 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-05-03 16:43:25,676 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-05-03 16:43:26,223 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:43:26,357 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:43:26,849 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-05-03 16:43:27,134 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:43:27,421 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 16:43:27,814 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 16:43:27,988 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-05-03 16:43:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:28,104 INFO L93 Difference]: Finished difference Result 3943 states and 12667 transitions. [2021-05-03 16:43:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-03 16:43:28,105 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 16:43:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:28,111 INFO L225 Difference]: With dead ends: 3943 [2021-05-03 16:43:28,111 INFO L226 Difference]: Without dead ends: 3907 [2021-05-03 16:43:28,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 12734.3ms TimeCoverageRelationStatistics Valid=1545, Invalid=6111, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 16:43:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-05-03 16:43:28,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2227. [2021-05-03 16:43:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.4065588499550765) internal successors, (7583), 2226 states have internal predecessors, (7583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 7583 transitions. [2021-05-03 16:43:28,166 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 7583 transitions. Word has length 26 [2021-05-03 16:43:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:28,166 INFO L480 AbstractCegarLoop]: Abstraction has 2227 states and 7583 transitions. [2021-05-03 16:43:28,166 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 16:43:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 7583 transitions. [2021-05-03 16:43:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:28,168 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:28,168 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 16:43:28,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2550,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:28,373 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 30 times [2021-05-03 16:43:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:28,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574573468] [2021-05-03 16:43:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:28,720 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 16:43:28,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574573468] [2021-05-03 16:43:28,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120226583] [2021-05-03 16:43:28,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:28,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:43:28,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:28,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:43:28,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:29,199 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:43:29,400 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:43:30,047 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:43:30,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:30,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:30,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-05-03 16:43:30,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:30,510 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:43:30,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:30,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:30,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 40 [2021-05-03 16:43:30,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:30,655 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:43:30,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:43:30,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:30,998 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:43:30,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:31,073 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:43:31,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:43:31,079 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:31,140 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:43:31,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:43:31,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:31,454 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:43:31,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:31,544 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:43:31,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:31,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:31,613 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:43:31,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:31,623 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:31,932 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:43:31,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:31,967 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 16:43:31,967 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:345, output treesize:607 [2021-05-03 16:43:33,006 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2021-05-03 16:43:33,371 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-05-03 16:43:33,490 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 16:43:33,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:33,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 16:43:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497418519] [2021-05-03 16:43:33,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:43:33,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:43:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:43:33,491 INFO L87 Difference]: Start difference. First operand 2227 states and 7583 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 16:43:33,770 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 19 [2021-05-03 16:43:33,914 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 19 [2021-05-03 16:43:34,400 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 16:43:34,728 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-05-03 16:43:35,186 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2021-05-03 16:43:35,609 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:43:35,816 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:43:36,054 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-05-03 16:43:36,221 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2021-05-03 16:43:36,440 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2021-05-03 16:43:37,363 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 45 [2021-05-03 16:43:38,168 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 52 [2021-05-03 16:43:38,447 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 19 [2021-05-03 16:43:38,604 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2021-05-03 16:43:39,529 WARN L205 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 63 [2021-05-03 16:43:39,844 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 44 [2021-05-03 16:43:40,472 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2021-05-03 16:43:41,099 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 45 [2021-05-03 16:43:41,288 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 16:43:41,620 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 26 [2021-05-03 16:43:42,120 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2021-05-03 16:43:42,676 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-05-03 16:43:43,193 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2021-05-03 16:43:43,830 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-05-03 16:43:44,342 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-05-03 16:43:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:44,438 INFO L93 Difference]: Finished difference Result 2885 states and 9535 transitions. [2021-05-03 16:43:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:43:44,440 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 16:43:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:44,445 INFO L225 Difference]: With dead ends: 2885 [2021-05-03 16:43:44,445 INFO L226 Difference]: Without dead ends: 2870 [2021-05-03 16:43:44,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 11483.7ms TimeCoverageRelationStatistics Valid=388, Invalid=1964, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:43:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-05-03 16:43:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2222. [2021-05-03 16:43:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 3.4074741107609183) internal successors, (7568), 2221 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 7568 transitions. [2021-05-03 16:43:44,475 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 7568 transitions. Word has length 26 [2021-05-03 16:43:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:44,475 INFO L480 AbstractCegarLoop]: Abstraction has 2222 states and 7568 transitions. [2021-05-03 16:43:44,475 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 16:43:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 7568 transitions. [2021-05-03 16:43:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:44,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:44,478 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 16:43:44,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-05-03 16:43:44,678 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:44,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:44,679 INFO L82 PathProgramCache]: Analyzing trace with hash -364416823, now seen corresponding path program 31 times [2021-05-03 16:43:44,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:44,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478942211] [2021-05-03 16:43:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:44,920 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 16:43:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:45,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478942211] [2021-05-03 16:43:45,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298088378] [2021-05-03 16:43:45,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:43:45,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:45,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:45,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:45,824 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 33 treesize of output 19 [2021-05-03 16:43:45,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:45,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:45,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:45,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:43:45,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:45,877 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:45,878 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 28 treesize of output 16 [2021-05-03 16:43:45,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:45,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:45,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:43:45,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:45,947 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:45,947 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 28 treesize of output 16 [2021-05-03 16:43:45,949 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:45,976 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:45,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:43:45,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,007 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:46,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:43:46,011 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,041 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:46,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:43:46,043 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:46,071 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 28 treesize of output 16 [2021-05-03 16:43:46,074 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:46,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:43:46,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:46,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:46,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,187 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:46,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:43:46,190 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,224 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:46,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:46,229 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,263 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:46,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-05-03 16:43:46,266 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:43:46,295 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:46,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:43:46,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:43:46,311 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:46,600 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 16:43:46,601 INFO L628 ElimStorePlain]: treesize reduction 46, result has 70.1 percent of original size [2021-05-03 16:43:46,605 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 16:43:46,605 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:665, output treesize:87 [2021-05-03 16:43:46,809 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-05-03 16:43:46,891 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 16:43:46,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:46,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:43:46,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710312687] [2021-05-03 16:43:46,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:43:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:43:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:43:46,892 INFO L87 Difference]: Start difference. First operand 2222 states and 7568 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 16:43:47,367 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-05-03 16:43:47,600 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:43:47,981 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-05-03 16:43:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:48,041 INFO L93 Difference]: Finished difference Result 2747 states and 9184 transitions. [2021-05-03 16:43:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:43:48,043 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 16:43:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:48,047 INFO L225 Difference]: With dead ends: 2747 [2021-05-03 16:43:48,048 INFO L226 Difference]: Without dead ends: 2732 [2021-05-03 16:43:48,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1574.7ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:43:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-05-03 16:43:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2215. [2021-05-03 16:43:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 3.403342366757001) internal successors, (7535), 2214 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 7535 transitions. [2021-05-03 16:43:48,076 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 7535 transitions. Word has length 26 [2021-05-03 16:43:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:48,076 INFO L480 AbstractCegarLoop]: Abstraction has 2215 states and 7535 transitions. [2021-05-03 16:43:48,076 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 16:43:48,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 7535 transitions. [2021-05-03 16:43:48,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:48,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:48,079 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 16:43:48,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2653 [2021-05-03 16:43:48,279 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:48,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:48,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2094376111, now seen corresponding path program 32 times [2021-05-03 16:43:48,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:48,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206064147] [2021-05-03 16:43:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:48,672 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 16:43:48,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206064147] [2021-05-03 16:43:48,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249725171] [2021-05-03 16:43:48,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:48,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:43:48,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 16:43:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,406 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:43:49,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:49,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-05-03 16:43:49,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,458 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:43:49,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:49,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 26 [2021-05-03 16:43:49,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,520 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-05-03 16:43:49,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,558 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:49,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-05-03 16:43:49,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,581 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:43:49,583 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:43:49,605 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:43:49,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,657 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:49,661 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,689 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:49,690 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 34 treesize of output 22 [2021-05-03 16:43:49,692 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,720 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:49,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-05-03 16:43:49,722 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:49,747 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 32 treesize of output 26 [2021-05-03 16:43:49,755 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:43:49,776 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,803 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:43:49,805 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:49,823 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:43:49,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:43:49,825 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:50,104 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-03 16:43:50,105 INFO L628 ElimStorePlain]: treesize reduction 26, result has 82.8 percent of original size [2021-05-03 16:43:50,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:43:50,108 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:697, output treesize:91 [2021-05-03 16:43:50,253 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 16:43:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:50,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:50,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:43:50,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754492141] [2021-05-03 16:43:50,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:43:50,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:43:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:43:50,354 INFO L87 Difference]: Start difference. First operand 2215 states and 7535 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 16:43:50,838 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-05-03 16:43:51,080 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 16:43:51,435 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 16:43:51,717 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 16:43:52,084 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-05-03 16:43:52,654 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-05-03 16:43:52,836 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:43:52,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:52,961 INFO L93 Difference]: Finished difference Result 2600 states and 8694 transitions. [2021-05-03 16:43:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:43:52,963 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 16:43:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:52,967 INFO L225 Difference]: With dead ends: 2600 [2021-05-03 16:43:52,967 INFO L226 Difference]: Without dead ends: 2571 [2021-05-03 16:43:52,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2440.5ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:43:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-05-03 16:43:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2195. [2021-05-03 16:43:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 3.397447584320875) internal successors, (7454), 2194 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 7454 transitions. [2021-05-03 16:43:52,994 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 7454 transitions. Word has length 26 [2021-05-03 16:43:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:52,995 INFO L480 AbstractCegarLoop]: Abstraction has 2195 states and 7454 transitions. [2021-05-03 16:43:52,995 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 16:43:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 7454 transitions. [2021-05-03 16:43:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:52,997 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:52,998 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 16:43:53,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2700 [2021-05-03 16:43:53,213 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -583168205, now seen corresponding path program 33 times [2021-05-03 16:43:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:53,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319563767] [2021-05-03 16:43:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:53,494 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:43:53,723 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 16:43:53,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319563767] [2021-05-03 16:43:53,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956662089] [2021-05-03 16:43:53,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:43:53,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:43:53,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:43:53,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:54,525 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:43:54,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:54,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:54,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:54,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:54,943 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-05-03 16:43:54,944 INFO L628 ElimStorePlain]: treesize reduction 121, result has 44.0 percent of original size [2021-05-03 16:43:54,950 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 16:43:54,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:55,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:55,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:55,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:55,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:55,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:55,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:55,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:55,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:43:55,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:43:55,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:55,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:55,239 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 16:43:55,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:248, output treesize:29 [2021-05-03 16:43:55,340 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 16:43:55,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:55,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:43:55,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844131217] [2021-05-03 16:43:55,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:43:55,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:55,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:43:55,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:43:55,341 INFO L87 Difference]: Start difference. First operand 2195 states and 7454 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 16:43:55,760 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-03 16:43:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:43:56,061 INFO L93 Difference]: Finished difference Result 2371 states and 7948 transitions. [2021-05-03 16:43:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:43:56,062 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 16:43:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:43:56,067 INFO L225 Difference]: With dead ends: 2371 [2021-05-03 16:43:56,067 INFO L226 Difference]: Without dead ends: 2356 [2021-05-03 16:43:56,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1329.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:43:56,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-05-03 16:43:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2175. [2021-05-03 16:43:56,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.405703771849126) internal successors, (7404), 2174 states have internal predecessors, (7404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:43:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7404 transitions. [2021-05-03 16:43:56,091 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7404 transitions. Word has length 26 [2021-05-03 16:43:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:43:56,091 INFO L480 AbstractCegarLoop]: Abstraction has 2175 states and 7404 transitions. [2021-05-03 16:43:56,091 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 16:43:56,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7404 transitions. [2021-05-03 16:43:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:43:56,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:43:56,094 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 16:43:56,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2749,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:56,294 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:43:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:43:56,294 INFO L82 PathProgramCache]: Analyzing trace with hash 987657395, now seen corresponding path program 34 times [2021-05-03 16:43:56,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:43:56,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5012831] [2021-05-03 16:43:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:43:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:43:56,647 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 28 [2021-05-03 16:43:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:43:56,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5012831] [2021-05-03 16:43:56,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834585668] [2021-05-03 16:43:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:43:56,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:43:56,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:43:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:43:56,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:43:57,409 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_251, v_prenex_253], 3=[v_prenex_249]} [2021-05-03 16:43:57,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:57,439 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:57,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:43:57,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:57,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:57,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 16:43:57,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:57,818 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:43:57,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:57,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:57,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:43:57,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:57,887 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:43:57,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:58,151 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 16:43:58,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:58,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:58,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:43:58,181 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 30 treesize of output 20 [2021-05-03 16:43:58,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:58,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:58,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:58,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:43:58,215 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:58,468 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 16:43:58,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:58,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:58,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:43:58,503 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:43:58,525 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:43:58,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-05-03 16:43:58,528 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:43:58,758 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:43:58,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:43:58,767 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 16:43:58,767 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:323, output treesize:151 [2021-05-03 16:43:59,043 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 16:43:59,153 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 16:43:59,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:43:59,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 16:43:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007785766] [2021-05-03 16:43:59,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:43:59,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:43:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:43:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:43:59,154 INFO L87 Difference]: Start difference. First operand 2175 states and 7404 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 16:44:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:00,500 INFO L93 Difference]: Finished difference Result 2790 states and 9311 transitions. [2021-05-03 16:44:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:44:00,502 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 16:44:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:00,508 INFO L225 Difference]: With dead ends: 2790 [2021-05-03 16:44:00,508 INFO L226 Difference]: Without dead ends: 2765 [2021-05-03 16:44:00,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1881.7ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:44:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-05-03 16:44:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2159. [2021-05-03 16:44:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 3.3985171455050973) internal successors, (7334), 2158 states have internal predecessors, (7334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:00,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 7334 transitions. [2021-05-03 16:44:00,536 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 7334 transitions. Word has length 26 [2021-05-03 16:44:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:00,536 INFO L480 AbstractCegarLoop]: Abstraction has 2159 states and 7334 transitions. [2021-05-03 16:44:00,537 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 16:44:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 7334 transitions. [2021-05-03 16:44:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:00,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:00,539 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, 1, 1] [2021-05-03 16:44:00,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2763,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:00,740 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 35 times [2021-05-03 16:44:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:00,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182142657] [2021-05-03 16:44:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:01,041 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-05-03 16:44:01,207 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-05-03 16:44:01,343 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 16:44:01,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182142657] [2021-05-03 16:44:01,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148099761] [2021-05-03 16:44:01,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:01,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:44:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:01,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:44:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:01,786 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:44:02,218 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:44:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:02,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:02,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:44:02,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:02,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:02,553 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:02,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:44:02,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:03,450 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-05-03 16:44:03,451 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-05-03 16:44:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:03,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:03,492 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 30 treesize of output 24 [2021-05-03 16:44:03,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:03,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:03,535 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:03,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:44:03,538 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:03,959 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:44:03,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:03,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:04,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:04,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:44:04,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:04,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:04,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:44:04,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:04,770 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-05-03 16:44:04,771 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.6 percent of original size [2021-05-03 16:44:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:04,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:04,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:04,813 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:04,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:04,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:44:04,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,152 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-05-03 16:44:05,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:05,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:05,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-05-03 16:44:05,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:05,220 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:05,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:05,224 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:05,539 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 16:44:05,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:05,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:44:05,550 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:170 [2021-05-03 16:44:05,794 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-05-03 16:44:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:05,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:05,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:44:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964112447] [2021-05-03 16:44:05,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:05,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:05,926 INFO L87 Difference]: Start difference. First operand 2159 states and 7334 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 16:44:06,292 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-05-03 16:44:06,719 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 16:44:06,956 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 16:44:07,405 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:44:07,752 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:44:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:08,207 INFO L93 Difference]: Finished difference Result 2812 states and 9378 transitions. [2021-05-03 16:44:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:44:08,209 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 16:44:08,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:08,214 INFO L225 Difference]: With dead ends: 2812 [2021-05-03 16:44:08,214 INFO L226 Difference]: Without dead ends: 2787 [2021-05-03 16:44:08,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3018.0ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:44:08,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-05-03 16:44:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2155. [2021-05-03 16:44:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.3983286908077996) internal successors, (7320), 2154 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7320 transitions. [2021-05-03 16:44:08,259 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7320 transitions. Word has length 26 [2021-05-03 16:44:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:08,259 INFO L480 AbstractCegarLoop]: Abstraction has 2155 states and 7320 transitions. [2021-05-03 16:44:08,259 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 16:44:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7320 transitions. [2021-05-03 16:44:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:08,262 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:08,262 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 16:44:08,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2793 [2021-05-03 16:44:08,463 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-05-03 16:44:08,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:08,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566138822] [2021-05-03 16:44:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:08,852 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 16:44:08,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566138822] [2021-05-03 16:44:08,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179092669] [2021-05-03 16:44:08,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:08,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:44:08,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:08,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:44:08,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:09,424 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:44:09,882 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 16:44:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:10,558 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:10,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:44:10,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:10,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:10,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:44:10,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:11,003 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 16:44:11,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:11,069 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:11,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:44:11,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:11,137 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:11,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:44:11,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:11,486 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:44:11,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:11,551 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:11,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:44:11,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:11,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:11,616 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:11,616 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:44:11,619 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:11,952 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 16:44:11,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:12,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:12,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:12,023 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:12,075 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:12,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:44:12,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:12,422 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:44:12,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:12,451 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 16:44:12,452 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:217 [2021-05-03 16:44:12,863 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 16:44:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:44:12,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:12,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:44:12,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632136714] [2021-05-03 16:44:12,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:44:12,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:12,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:44:12,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:44:12,956 INFO L87 Difference]: Start difference. First operand 2155 states and 7320 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 16:44:13,514 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-05-03 16:44:13,936 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 16:44:14,614 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2021-05-03 16:44:14,939 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:44:15,312 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:44:15,843 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-05-03 16:44:16,449 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-05-03 16:44:17,051 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-05-03 16:44:17,679 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-05-03 16:44:17,979 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:44:18,398 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:44:18,634 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-05-03 16:44:19,044 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-05-03 16:44:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:19,108 INFO L93 Difference]: Finished difference Result 2851 states and 9400 transitions. [2021-05-03 16:44:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:44:19,111 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 16:44:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:19,116 INFO L225 Difference]: With dead ends: 2851 [2021-05-03 16:44:19,116 INFO L226 Difference]: Without dead ends: 2821 [2021-05-03 16:44:19,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 6354.7ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:44:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-05-03 16:44:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2173. [2021-05-03 16:44:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.399171270718232) internal successors, (7383), 2172 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7383 transitions. [2021-05-03 16:44:19,146 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7383 transitions. Word has length 26 [2021-05-03 16:44:19,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:19,146 INFO L480 AbstractCegarLoop]: Abstraction has 2173 states and 7383 transitions. [2021-05-03 16:44:19,146 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 16:44:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7383 transitions. [2021-05-03 16:44:19,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:19,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:19,149 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 16:44:19,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-05-03 16:44:19,350 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 37 times [2021-05-03 16:44:19,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:19,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640593166] [2021-05-03 16:44:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:19,699 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 16:44:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640593166] [2021-05-03 16:44:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552192637] [2021-05-03 16:44:19,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:44:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:44:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:20,186 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:44:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:20,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:44:20,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:20,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:44:20,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:20,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:20,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,618 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:20,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,647 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:20,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,676 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 33 treesize of output 19 [2021-05-03 16:44:20,678 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:44:20,708 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:20,750 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 21 treesize of output 17 [2021-05-03 16:44:20,755 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:44:20,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,813 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 28 treesize of output 16 [2021-05-03 16:44:20,815 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,846 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:20,849 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,873 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,873 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 30 treesize of output 1 [2021-05-03 16:44:20,875 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,894 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:44:20,896 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:20,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:44:20,929 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,949 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:20,952 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:20,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:20,963 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 28 treesize of output 16 [2021-05-03 16:44:20,965 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:21,219 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:44:21,220 INFO L628 ElimStorePlain]: treesize reduction 66, result has 57.4 percent of original size [2021-05-03 16:44:21,226 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 16:44:21,226 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:649, output treesize:71 [2021-05-03 16:44:21,481 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 16:44:21,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:21,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:44:21,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050430924] [2021-05-03 16:44:21,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:21,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:21,482 INFO L87 Difference]: Start difference. First operand 2173 states and 7383 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 16:44:22,452 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:44:22,741 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:44:23,001 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:44:23,316 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 16:44:23,514 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 16:44:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:23,659 INFO L93 Difference]: Finished difference Result 2994 states and 9969 transitions. [2021-05-03 16:44:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:44:23,661 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 16:44:23,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:23,667 INFO L225 Difference]: With dead ends: 2994 [2021-05-03 16:44:23,667 INFO L226 Difference]: Without dead ends: 2979 [2021-05-03 16:44:23,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 2287.7ms TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:44:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2979 states. [2021-05-03 16:44:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2979 to 2173. [2021-05-03 16:44:23,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 3.399171270718232) internal successors, (7383), 2172 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 7383 transitions. [2021-05-03 16:44:23,698 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 7383 transitions. Word has length 26 [2021-05-03 16:44:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:23,699 INFO L480 AbstractCegarLoop]: Abstraction has 2173 states and 7383 transitions. [2021-05-03 16:44:23,699 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 16:44:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 7383 transitions. [2021-05-03 16:44:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:23,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:23,702 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 16:44:23,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-05-03 16:44:23,902 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-05-03 16:44:23,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:23,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000378020] [2021-05-03 16:44:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:24,241 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 16:44:24,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000378020] [2021-05-03 16:44:24,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030053689] [2021-05-03 16:44:24,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:24,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:44:24,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:24,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:44:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:24,843 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:44:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:25,383 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:25,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:44:25,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:25,446 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:25,447 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:44:25,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:25,865 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:44:25,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:25,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:25,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:44:25,941 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:25,997 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:25,997 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:44:26,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:26,372 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 16:44:26,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:26,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:26,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:26,432 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:26,489 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:26,489 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:44:26,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:26,793 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:44:26,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:26,847 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:26,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:26,857 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:26,919 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:26,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:26,923 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:27,245 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:44:27,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:27,275 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 16:44:27,276 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:345, output treesize:220 [2021-05-03 16:44:27,638 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 16:44:27,763 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 16:44:27,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:27,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:44:27,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810349524] [2021-05-03 16:44:27,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:27,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:27,764 INFO L87 Difference]: Start difference. First operand 2173 states and 7383 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 16:44:28,506 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:44:29,129 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-05-03 16:44:29,465 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:44:29,646 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:44:29,983 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-05-03 16:44:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:30,045 INFO L93 Difference]: Finished difference Result 2818 states and 9434 transitions. [2021-05-03 16:44:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:44:30,047 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 16:44:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:30,051 INFO L225 Difference]: With dead ends: 2818 [2021-05-03 16:44:30,051 INFO L226 Difference]: Without dead ends: 2803 [2021-05-03 16:44:30,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2753.3ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:44:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-05-03 16:44:30,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2176. [2021-05-03 16:44:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.4013793103448275) internal successors, (7398), 2175 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:30,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7398 transitions. [2021-05-03 16:44:30,078 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7398 transitions. Word has length 26 [2021-05-03 16:44:30,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:30,079 INFO L480 AbstractCegarLoop]: Abstraction has 2176 states and 7398 transitions. [2021-05-03 16:44:30,079 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 16:44:30,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7398 transitions. [2021-05-03 16:44:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:30,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:30,081 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 16:44:30,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:30,282 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-05-03 16:44:30,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:30,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960145740] [2021-05-03 16:44:30,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:30,748 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 16:44:30,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960145740] [2021-05-03 16:44:30,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613910065] [2021-05-03 16:44:30,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:30,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:44:30,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:44:30,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:31,294 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-03 16:44:31,523 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:44:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:32,152 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:32,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:32,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:32,229 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:32,230 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:44:32,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:32,601 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:44:32,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:32,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:32,669 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:32,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:44:32,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:32,730 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:44:32,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:44:32,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,074 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:44:33,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,140 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:33,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:33,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:33,192 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,561 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 16:44:33,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,623 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:44:33,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:44:33,628 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:33,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,664 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:44:33,679 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:33,963 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:44:33,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:33,994 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 16:44:33,994 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:341, output treesize:217 [2021-05-03 16:44:34,385 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-03 16:44:34,517 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 16:44:34,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:34,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 16:44:34,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057573817] [2021-05-03 16:44:34,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:44:34,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:34,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:44:34,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:44:34,518 INFO L87 Difference]: Start difference. First operand 2176 states and 7398 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 16:44:35,134 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2021-05-03 16:44:35,459 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:44:35,774 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:44:36,097 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:44:36,497 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:44:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:36,613 INFO L93 Difference]: Finished difference Result 2830 states and 9473 transitions. [2021-05-03 16:44:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:44:36,615 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 16:44:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:36,620 INFO L225 Difference]: With dead ends: 2830 [2021-05-03 16:44:36,620 INFO L226 Difference]: Without dead ends: 2815 [2021-05-03 16:44:36,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2681.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:44:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-05-03 16:44:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2197. [2021-05-03 16:44:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2196 states have (on average 3.398907103825137) internal successors, (7464), 2196 states have internal predecessors, (7464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 7464 transitions. [2021-05-03 16:44:36,650 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 7464 transitions. Word has length 26 [2021-05-03 16:44:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:36,650 INFO L480 AbstractCegarLoop]: Abstraction has 2197 states and 7464 transitions. [2021-05-03 16:44:36,650 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 16:44:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 7464 transitions. [2021-05-03 16:44:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:36,653 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:36,653 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 16:44:36,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3000 [2021-05-03 16:44:36,853 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-05-03 16:44:36,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:36,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579481744] [2021-05-03 16:44:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:37,166 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 16:44:37,347 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 16:44:37,555 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 16:44:37,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579481744] [2021-05-03 16:44:37,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278279930] [2021-05-03 16:44:37,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:37,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:44:37,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:37,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:44:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:37,970 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:44:38,647 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-05-03 16:44:39,444 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 70 [2021-05-03 16:44:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:39,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:44:39,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:39,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:39,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:39,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:44:39,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:40,166 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-05-03 16:44:40,168 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.2 percent of original size [2021-05-03 16:44:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:40,178 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 16:44:40,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:40,321 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:44:40,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:40,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:40,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:40,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:44:40,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:40,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:40,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:40,442 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 16:44:40,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:40,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:40,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:44:40,534 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:229, output treesize:32 [2021-05-03 16:44:40,688 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 16:44:40,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:40,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 16:44:40,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224784175] [2021-05-03 16:44:40,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:44:40,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:40,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:44:40,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:44:40,689 INFO L87 Difference]: Start difference. First operand 2197 states and 7464 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 16:44:41,305 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 16:44:42,201 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:44:42,928 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:44:43,925 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 100 [2021-05-03 16:44:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:44,545 INFO L93 Difference]: Finished difference Result 2967 states and 9803 transitions. [2021-05-03 16:44:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:44:44,548 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 16:44:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:44,553 INFO L225 Difference]: With dead ends: 2967 [2021-05-03 16:44:44,553 INFO L226 Difference]: Without dead ends: 2910 [2021-05-03 16:44:44,553 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 4697.7ms TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:44:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-05-03 16:44:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2256. [2021-05-03 16:44:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 3.3986696230598668) internal successors, (7664), 2255 states have internal predecessors, (7664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 7664 transitions. [2021-05-03 16:44:44,582 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 7664 transitions. Word has length 26 [2021-05-03 16:44:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:44,582 INFO L480 AbstractCegarLoop]: Abstraction has 2256 states and 7664 transitions. [2021-05-03 16:44:44,582 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 16:44:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 7664 transitions. [2021-05-03 16:44:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:44,585 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:44,585 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 16:44:44,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3061,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:44,785 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:44,786 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-05-03 16:44:44,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:44,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814959221] [2021-05-03 16:44:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:45,087 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-05-03 16:44:45,245 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 16:44:45,348 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 16:44:45,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814959221] [2021-05-03 16:44:45,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336315210] [2021-05-03 16:44:45,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:45,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:44:45,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:45,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:44:45,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:45,837 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:44:46,442 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:44:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:46,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:46,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:44:46,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:46,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:46,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:46,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:46,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:47,820 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-05-03 16:44:47,821 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-05-03 16:44:47,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:47,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:47,859 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 28 treesize of output 24 [2021-05-03 16:44:47,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:48,344 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:44:48,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:48,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:48,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:48,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:48,835 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-05-03 16:44:48,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:48,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:48,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:48,884 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 30 treesize of output 24 [2021-05-03 16:44:48,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:48,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:48,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:44:48,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:49,638 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-05-03 16:44:49,639 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.0 percent of original size [2021-05-03 16:44:49,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:49,668 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:49,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:49,673 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:50,003 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:44:50,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:50,036 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:44:50,040 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:50,335 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 16:44:50,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:50,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:50,377 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:44:50,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:50,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:44:50,412 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:50,977 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-05-03 16:44:50,978 INFO L628 ElimStorePlain]: treesize reduction 22, result has 89.8 percent of original size [2021-05-03 16:44:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:51,008 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:51,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:51,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:51,289 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:44:51,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:51,305 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 16:44:51,305 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:150 [2021-05-03 16:44:51,758 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-05-03 16:44:51,874 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 16:44:51,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:51,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:44:51,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730442448] [2021-05-03 16:44:51,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:51,875 INFO L87 Difference]: Start difference. First operand 2256 states and 7664 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 16:44:52,413 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 16:44:53,215 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:44:53,828 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:44:54,347 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-05-03 16:44:54,772 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:44:55,244 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-05-03 16:44:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:44:55,538 INFO L93 Difference]: Finished difference Result 3226 states and 10642 transitions. [2021-05-03 16:44:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:44:55,541 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 16:44:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:44:55,548 INFO L225 Difference]: With dead ends: 3226 [2021-05-03 16:44:55,548 INFO L226 Difference]: Without dead ends: 3190 [2021-05-03 16:44:55,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4348.0ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:44:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-05-03 16:44:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2236. [2021-05-03 16:44:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.3982102908277403) internal successors, (7595), 2235 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:44:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7595 transitions. [2021-05-03 16:44:55,594 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7595 transitions. Word has length 26 [2021-05-03 16:44:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:44:55,594 INFO L480 AbstractCegarLoop]: Abstraction has 2236 states and 7595 transitions. [2021-05-03 16:44:55,594 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 16:44:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7595 transitions. [2021-05-03 16:44:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:44:55,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:44:55,598 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 16:44:55,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:55,799 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:44:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:44:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-05-03 16:44:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:44:55,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761213852] [2021-05-03 16:44:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:44:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:44:56,296 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-05-03 16:44:56,502 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 16:44:56,636 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 16:44:56,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761213852] [2021-05-03 16:44:56,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227554841] [2021-05-03 16:44:56,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:44:56,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:44:56,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:44:56,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:44:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:44:57,172 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:44:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:57,308 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 45 treesize of output 31 [2021-05-03 16:44:57,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-05-03 16:44:57,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,388 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:57,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,429 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-05-03 16:44:57,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-05-03 16:44:57,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,519 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:57,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:44:57,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:57,588 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:57,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-05-03 16:44:57,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,672 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:44:57,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,708 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:57,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,746 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,747 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 43 treesize of output 1 [2021-05-03 16:44:57,749 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,801 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:57,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 26 [2021-05-03 16:44:57,806 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,840 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 45 treesize of output 27 [2021-05-03 16:44:57,843 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,887 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:44:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:44:57,892 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-05-03 16:44:57,924 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:44:57,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:44:57,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-05-03 16:44:57,951 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:44:58,285 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:44:58,286 INFO L628 ElimStorePlain]: treesize reduction 24, result has 83.9 percent of original size [2021-05-03 16:44:58,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:44:58,288 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:125 [2021-05-03 16:44:58,506 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:44:58,642 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 16:44:58,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:44:58,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:44:58,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344577133] [2021-05-03 16:44:58,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:44:58,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:44:58,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:44:58,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:44:58,643 INFO L87 Difference]: Start difference. First operand 2236 states and 7595 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 16:44:59,182 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 16:44:59,522 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-05-03 16:44:59,951 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-05-03 16:45:00,335 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-05-03 16:45:01,238 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-05-03 16:45:01,626 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:45:02,056 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 19 [2021-05-03 16:45:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:02,464 INFO L93 Difference]: Finished difference Result 2948 states and 9791 transitions. [2021-05-03 16:45:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:45:02,467 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 16:45:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:02,472 INFO L225 Difference]: With dead ends: 2948 [2021-05-03 16:45:02,472 INFO L226 Difference]: Without dead ends: 2902 [2021-05-03 16:45:02,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3922.1ms TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:45:02,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-05-03 16:45:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2236. [2021-05-03 16:45:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.3982102908277403) internal successors, (7595), 2235 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7595 transitions. [2021-05-03 16:45:02,503 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7595 transitions. Word has length 26 [2021-05-03 16:45:02,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:02,503 INFO L480 AbstractCegarLoop]: Abstraction has 2236 states and 7595 transitions. [2021-05-03 16:45:02,503 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 16:45:02,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7595 transitions. [2021-05-03 16:45:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:02,506 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:02,506 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 16:45:02,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3106 [2021-05-03 16:45:02,706 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:02,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-05-03 16:45:02,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:02,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143884546] [2021-05-03 16:45:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:03,058 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-05-03 16:45:03,362 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 16:45:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:03,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143884546] [2021-05-03 16:45:03,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157894350] [2021-05-03 16:45:03,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:45:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:45:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:04,149 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:45:04,686 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-05-03 16:45:05,210 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_330, v_prenex_331, v_prenex_333], 3=[v_prenex_329]} [2021-05-03 16:45:05,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:05,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:45:05,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:05,309 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:05,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:45:05,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:06,373 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2021-05-03 16:45:06,374 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.7 percent of original size [2021-05-03 16:45:06,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:06,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:06,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:45:06,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:06,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:06,494 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:06,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:06,940 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:45:06,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:06,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:06,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:45:06,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:06,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:07,017 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:07,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:45:07,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:07,472 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:45:07,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:07,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:07,529 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:07,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:45:07,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:07,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:07,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:07,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:07,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:07,990 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:45:07,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:08,039 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-05-03 16:45:08,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:08,044 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:08,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:08,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:08,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-05-03 16:45:08,079 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:08,444 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:45:08,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:08,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:45:08,454 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:180 [2021-05-03 16:45:08,738 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-05-03 16:45:08,924 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 16:45:08,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:08,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 16:45:08,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343963124] [2021-05-03 16:45:08,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:45:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:45:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:45:08,925 INFO L87 Difference]: Start difference. First operand 2236 states and 7595 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 16:45:09,725 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:45:10,219 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:45:10,573 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:45:10,878 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-05-03 16:45:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:11,071 INFO L93 Difference]: Finished difference Result 2821 states and 9462 transitions. [2021-05-03 16:45:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:45:11,074 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 16:45:11,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:11,080 INFO L225 Difference]: With dead ends: 2821 [2021-05-03 16:45:11,080 INFO L226 Difference]: Without dead ends: 2806 [2021-05-03 16:45:11,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 3273.3ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:45:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2021-05-03 16:45:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2236. [2021-05-03 16:45:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.3982102908277403) internal successors, (7595), 2235 states have internal predecessors, (7595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 7595 transitions. [2021-05-03 16:45:11,111 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 7595 transitions. Word has length 26 [2021-05-03 16:45:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:11,111 INFO L480 AbstractCegarLoop]: Abstraction has 2236 states and 7595 transitions. [2021-05-03 16:45:11,111 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 16:45:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 7595 transitions. [2021-05-03 16:45:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:11,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:11,114 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 16:45:11,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3125,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:11,315 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:11,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-05-03 16:45:11,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:11,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074058592] [2021-05-03 16:45:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:11,524 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:45:11,746 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 16:45:11,943 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 16:45:11,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074058592] [2021-05-03 16:45:11,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976667080] [2021-05-03 16:45:11,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:11,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:45:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:12,475 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:45:13,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:13,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:13,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:45:13,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:45:13,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:45:13,369 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:45:13,396 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:45:13,427 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:45:13,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:13,488 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:13,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:13,549 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:13,576 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:13,603 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:45:13,631 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:13,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:13,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:13,646 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:13,736 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:45:13,739 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 16:45:13,740 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:45:13,827 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 16:45:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:13,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:45:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220326751] [2021-05-03 16:45:13,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:45:13,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:13,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:45:13,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:45:13,829 INFO L87 Difference]: Start difference. First operand 2236 states and 7595 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 16:45:15,393 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:45:15,771 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 16:45:15,963 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 16:45:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:16,175 INFO L93 Difference]: Finished difference Result 2832 states and 9145 transitions. [2021-05-03 16:45:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:45:16,179 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 16:45:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:16,184 INFO L225 Difference]: With dead ends: 2832 [2021-05-03 16:45:16,184 INFO L226 Difference]: Without dead ends: 2795 [2021-05-03 16:45:16,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2343.6ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:45:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-05-03 16:45:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2244. [2021-05-03 16:45:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.3976816763263487) internal successors, (7621), 2243 states have internal predecessors, (7621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 7621 transitions. [2021-05-03 16:45:16,217 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 7621 transitions. Word has length 26 [2021-05-03 16:45:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:16,217 INFO L480 AbstractCegarLoop]: Abstraction has 2244 states and 7621 transitions. [2021-05-03 16:45:16,217 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 16:45:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 7621 transitions. [2021-05-03 16:45:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:16,220 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:16,220 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 16:45:16,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3163,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:16,420 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-05-03 16:45:16,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:16,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937600755] [2021-05-03 16:45:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:16,630 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:45:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937600755] [2021-05-03 16:45:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777088815] [2021-05-03 16:45:17,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:17,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:45:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:17,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:45:17,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:17,908 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-05-03 16:45:18,091 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_338, v_prenex_336], 5=[A, v_prenex_334]} [2021-05-03 16:45:18,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:18,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:18,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:45:18,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:18,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:18,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:18,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:18,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:18,526 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 16:45:18,527 INFO L628 ElimStorePlain]: treesize reduction 141, result has 43.6 percent of original size [2021-05-03 16:45:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 16:45:18,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:18,654 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:45:18,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:18,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:18,662 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 27 treesize of output 13 [2021-05-03 16:45:18,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:18,779 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:45:18,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:18,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:18,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:18,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:18,899 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:45:18,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:18,908 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 16:45:18,908 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-05-03 16:45:19,063 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 16:45:19,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:19,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:45:19,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640504339] [2021-05-03 16:45:19,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:45:19,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:45:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:45:19,064 INFO L87 Difference]: Start difference. First operand 2244 states and 7621 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 16:45:19,468 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 20 [2021-05-03 16:45:19,912 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-05-03 16:45:20,704 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-03 16:45:21,156 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-05-03 16:45:21,925 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:45:22,240 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:45:22,527 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:45:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:22,954 INFO L93 Difference]: Finished difference Result 2782 states and 9238 transitions. [2021-05-03 16:45:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:45:22,956 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 16:45:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:22,961 INFO L225 Difference]: With dead ends: 2782 [2021-05-03 16:45:22,962 INFO L226 Difference]: Without dead ends: 2736 [2021-05-03 16:45:22,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 3861.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1036, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:45:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-05-03 16:45:22,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2252. [2021-05-03 16:45:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2252 states, 2251 states have (on average 3.3936028431808087) internal successors, (7639), 2251 states have internal predecessors, (7639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2252 states to 2252 states and 7639 transitions. [2021-05-03 16:45:22,991 INFO L78 Accepts]: Start accepts. Automaton has 2252 states and 7639 transitions. Word has length 26 [2021-05-03 16:45:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:22,991 INFO L480 AbstractCegarLoop]: Abstraction has 2252 states and 7639 transitions. [2021-05-03 16:45:22,991 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 16:45:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2252 states and 7639 transitions. [2021-05-03 16:45:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:22,994 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:22,994 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 16:45:23,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3253 [2021-05-03 16:45:23,209 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:23,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:23,210 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-05-03 16:45:23,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:23,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704524397] [2021-05-03 16:45:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:23,478 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 16:45:23,774 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 16:45:24,053 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-03 16:45:24,217 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 16:45:24,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704524397] [2021-05-03 16:45:24,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860926845] [2021-05-03 16:45:24,217 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 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 16:45:24,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:45:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:45:24,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:24,806 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:45:25,461 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:45:26,210 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_353, v_prenex_354, v_prenex_356, v_prenex_347, v_prenex_348], 6=[v_prenex_350, v_prenex_351]} [2021-05-03 16:45:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:26,308 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:45:26,308 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 35 treesize of output 35 [2021-05-03 16:45:26,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:26,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:26,357 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:45:26,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:26,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:27,278 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-03 16:45:27,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:27,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:27,368 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:45:27,368 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 34 treesize of output 28 [2021-05-03 16:45:27,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:27,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:27,474 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:45:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-05-03 16:45:27,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:28,427 WARN L205 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-03 16:45:28,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:28,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:28,533 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:45:28,534 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 28 treesize of output 30 [2021-05-03 16:45:28,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:28,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:28,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:28,667 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-05-03 16:45:28,668 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 33 treesize of output 43 [2021-05-03 16:45:28,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:29,605 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-05-03 16:45:29,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:29,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:29,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:29,714 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:45:29,714 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 41 treesize of output 35 [2021-05-03 16:45:29,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:29,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:29,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:29,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:29,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-05-03 16:45:29,826 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:31,482 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 130 DAG size of output: 127 [2021-05-03 16:45:31,483 INFO L628 ElimStorePlain]: treesize reduction 28, result has 95.0 percent of original size [2021-05-03 16:45:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:31,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:31,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-05-03 16:45:31,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:31,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:31,683 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:45:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-05-03 16:45:31,697 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:33,199 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 127 DAG size of output: 116 [2021-05-03 16:45:33,200 INFO L628 ElimStorePlain]: treesize reduction 43, result has 91.6 percent of original size [2021-05-03 16:45:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:33,294 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:45:33,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:45:33,302 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:33,371 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:45:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-05-03 16:45:33,377 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:34,062 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 16:45:34,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:34,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,175 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-05-03 16:45:34,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-05-03 16:45:34,183 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:34,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,251 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:34,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-05-03 16:45:34,272 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:34,943 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-03 16:45:34,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:35,058 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-05-03 16:45:35,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-05-03 16:45:35,074 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:35,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:35,114 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-03 16:45:35,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-05-03 16:45:35,117 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:35,759 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-05-03 16:45:35,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:35,783 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 16:45:35,783 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:741, output treesize:319 [2021-05-03 16:45:36,191 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-05-03 16:45:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:45:36,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:36,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:45:36,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855759719] [2021-05-03 16:45:36,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:45:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:36,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:45:36,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:45:36,321 INFO L87 Difference]: Start difference. First operand 2252 states and 7639 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 16:45:37,147 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 16:45:37,854 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-03 16:45:38,053 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 16:45:38,391 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:45:38,659 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:45:39,135 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-05-03 16:45:39,746 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:45:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:40,325 INFO L93 Difference]: Finished difference Result 2884 states and 9647 transitions. [2021-05-03 16:45:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:45:40,328 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 16:45:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:40,333 INFO L225 Difference]: With dead ends: 2884 [2021-05-03 16:45:40,333 INFO L226 Difference]: Without dead ends: 2869 [2021-05-03 16:45:40,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4875.3ms TimeCoverageRelationStatistics Valid=220, Invalid=1040, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:45:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2869 states. [2021-05-03 16:45:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2869 to 2267. [2021-05-03 16:45:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 2266 states have (on average 3.3989408649602826) internal successors, (7702), 2266 states have internal predecessors, (7702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 7702 transitions. [2021-05-03 16:45:40,365 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 7702 transitions. Word has length 26 [2021-05-03 16:45:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:40,365 INFO L480 AbstractCegarLoop]: Abstraction has 2267 states and 7702 transitions. [2021-05-03 16:45:40,365 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 16:45:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 7702 transitions. [2021-05-03 16:45:40,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:40,368 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:40,368 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 16:45:40,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:40,569 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-05-03 16:45:40,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:40,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136685004] [2021-05-03 16:45:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:40,859 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-05-03 16:45:41,233 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-05-03 16:45:41,436 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 16:45:41,645 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 16:45:41,815 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-05-03 16:45:41,838 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 16:45:41,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136685004] [2021-05-03 16:45:41,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504431955] [2021-05-03 16:45:41,838 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 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 16:45:41,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:45:41,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:41,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:45:41,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:42,398 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:45:42,601 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:45:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,722 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:45:42,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,776 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:42,777 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 16:45:42,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,810 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:45:42,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:42,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:45:42,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,891 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:42,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:45:42,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,938 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:42,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:45:42,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:42,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:42,981 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 16 treesize of output 18 [2021-05-03 16:45:42,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,020 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:43,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:45:43,023 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,055 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:43,055 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 35 treesize of output 1 [2021-05-03 16:45:43,058 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,086 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:43,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:45:43,089 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:45:43,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:43,143 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,174 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:43,174 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 31 treesize of output 19 [2021-05-03 16:45:43,177 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,217 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:43,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:45:43,222 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,249 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:43,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:45:43,253 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,297 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:45:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 23 [2021-05-03 16:45:43,302 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:43,326 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:45:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:45:43,329 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:43,650 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-05-03 16:45:43,651 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-05-03 16:45:43,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:45:43,653 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-05-03 16:45:43,868 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-03 16:45:44,007 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 16:45:44,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:44,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:45:44,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667420727] [2021-05-03 16:45:44,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:45:44,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:44,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:45:44,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:45:44,008 INFO L87 Difference]: Start difference. First operand 2267 states and 7702 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 16:45:44,314 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-05-03 16:45:45,308 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2021-05-03 16:45:45,733 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 36 [2021-05-03 16:45:45,924 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 16:45:46,529 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-05-03 16:45:47,072 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-05-03 16:45:47,796 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-03 16:45:48,356 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-05-03 16:45:48,788 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-05-03 16:45:49,945 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-05-03 16:45:50,783 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-05-03 16:45:51,120 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 16:45:51,703 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-05-03 16:45:52,336 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 16:45:53,245 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-05-03 16:45:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:45:53,718 INFO L93 Difference]: Finished difference Result 2970 states and 9854 transitions. [2021-05-03 16:45:53,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:45:53,721 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 16:45:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:45:53,728 INFO L225 Difference]: With dead ends: 2970 [2021-05-03 16:45:53,728 INFO L226 Difference]: Without dead ends: 2955 [2021-05-03 16:45:53,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 8676.6ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:45:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-05-03 16:45:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2282. [2021-05-03 16:45:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 3.40201665935993) internal successors, (7760), 2281 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 7760 transitions. [2021-05-03 16:45:53,772 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 7760 transitions. Word has length 26 [2021-05-03 16:45:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:45:53,772 INFO L480 AbstractCegarLoop]: Abstraction has 2282 states and 7760 transitions. [2021-05-03 16:45:53,772 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 16:45:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 7760 transitions. [2021-05-03 16:45:53,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:45:53,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:45:53,776 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 16:45:53,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:45:53,978 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:45:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:45:53,978 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-05-03 16:45:53,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:45:53,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014568161] [2021-05-03 16:45:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:45:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:45:54,242 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 16:45:54,612 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 16:45:54,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014568161] [2021-05-03 16:45:54,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644254313] [2021-05-03 16:45:54,612 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 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 16:45:54,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:45:54,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:45:54,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:45:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:45:55,232 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:45:55,492 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:45:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:56,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:56,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:56,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:45:56,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:45:56,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,751 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 33 treesize of output 13 [2021-05-03 16:45:56,756 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:56,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,846 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 30 treesize of output 16 [2021-05-03 16:45:56,850 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:56,885 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:56,917 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,948 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 28 treesize of output 13 [2021-05-03 16:45:56,951 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:56,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:56,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:45:56,986 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:57,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:57,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:57,021 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:57,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:57,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:57,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,053 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 35 treesize of output 19 [2021-05-03 16:45:57,057 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:57,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:57,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:45:57,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:45:57,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:45:57,077 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:45:57,181 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-05-03 16:45:57,183 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:45:57,186 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 16:45:57,187 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:45:57,294 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 16:45:57,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:45:57,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-03 16:45:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952645855] [2021-05-03 16:45:57,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:45:57,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:45:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:45:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:45:57,295 INFO L87 Difference]: Start difference. First operand 2282 states and 7760 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:45:58,005 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:45:58,887 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 16:45:59,109 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:45:59,487 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:45:59,947 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-05-03 16:46:00,776 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:46:01,596 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-03 16:46:02,697 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 16:46:03,431 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 16:46:03,883 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 16:46:04,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:04,190 INFO L93 Difference]: Finished difference Result 3380 states and 10818 transitions. [2021-05-03 16:46:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:46:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:46:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:04,200 INFO L225 Difference]: With dead ends: 3380 [2021-05-03 16:46:04,200 INFO L226 Difference]: Without dead ends: 3343 [2021-05-03 16:46:04,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 5701.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 16:46:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-05-03 16:46:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2346. [2021-05-03 16:46:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 3.4072494669509594) internal successors, (7990), 2345 states have internal predecessors, (7990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 7990 transitions. [2021-05-03 16:46:04,238 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 7990 transitions. Word has length 26 [2021-05-03 16:46:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:04,238 INFO L480 AbstractCegarLoop]: Abstraction has 2346 states and 7990 transitions. [2021-05-03 16:46:04,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 7990 transitions. [2021-05-03 16:46:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:04,241 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:04,241 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 16:46:04,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:46:04,442 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:04,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:04,442 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-05-03 16:46:04,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:04,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173955290] [2021-05-03 16:46:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:04,765 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 16:46:05,026 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 16:46:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173955290] [2021-05-03 16:46:05,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040666920] [2021-05-03 16:46:05,027 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 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 16:46:05,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:46:05,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:05,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:46:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:05,489 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:46:06,119 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-05-03 16:46:06,810 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 16:46:07,551 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 57 [2021-05-03 16:46:08,236 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_372, v_prenex_368], 5=[A, v_prenex_370]} [2021-05-03 16:46:08,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:08,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:08,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:08,266 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 21 treesize of output 13 [2021-05-03 16:46:08,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:08,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:08,289 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 26 treesize of output 13 [2021-05-03 16:46:08,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:08,711 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-05-03 16:46:08,712 INFO L628 ElimStorePlain]: treesize reduction 131, result has 41.8 percent of original size [2021-05-03 16:46:08,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_368 vanished before elimination [2021-05-03 16:46:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:08,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:08,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:08,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:46:08,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:08,860 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:46:08,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:08,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:46:08,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:46:08,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:08,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:08,964 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 16:46:08,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:279, output treesize:22 [2021-05-03 16:46:09,114 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 16:46:09,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:09,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 16:46:09,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681001412] [2021-05-03 16:46:09,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:46:09,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:09,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:46:09,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:46:09,115 INFO L87 Difference]: Start difference. First operand 2346 states and 7990 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 16:46:10,005 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-03 16:46:10,410 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:46:10,938 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:46:11,595 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-05-03 16:46:12,396 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:46:13,030 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-05-03 16:46:13,195 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:46:14,124 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 64 [2021-05-03 16:46:14,734 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:46:15,641 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-05-03 16:46:16,198 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-05-03 16:46:16,860 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 16:46:17,749 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2021-05-03 16:46:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:18,467 INFO L93 Difference]: Finished difference Result 4141 states and 13315 transitions. [2021-05-03 16:46:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:46:18,471 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 16:46:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:18,481 INFO L225 Difference]: With dead ends: 4141 [2021-05-03 16:46:18,481 INFO L226 Difference]: Without dead ends: 4111 [2021-05-03 16:46:18,482 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 9370.2ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:46:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-05-03 16:46:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 2486. [2021-05-03 16:46:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.426559356136821) internal successors, (8515), 2485 states have internal predecessors, (8515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 8515 transitions. [2021-05-03 16:46:18,523 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 8515 transitions. Word has length 26 [2021-05-03 16:46:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:18,523 INFO L480 AbstractCegarLoop]: Abstraction has 2486 states and 8515 transitions. [2021-05-03 16:46:18,523 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 16:46:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 8515 transitions. [2021-05-03 16:46:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:18,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:18,526 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 16:46:18,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3444,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:46:18,727 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:18,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-05-03 16:46:18,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:18,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413408418] [2021-05-03 16:46:18,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:18,999 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-05-03 16:46:19,237 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 16:46:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413408418] [2021-05-03 16:46:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792145631] [2021-05-03 16:46:19,237 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 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 16:46:19,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:46:19,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:19,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:46:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:20,001 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-05-03 16:46:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:20,281 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-05-03 16:46:20,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2021-05-03 16:46:20,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:20,409 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-05-03 16:46:20,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 34 [2021-05-03 16:46:20,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:20,533 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-05-03 16:46:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 23 [2021-05-03 16:46:20,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:20,613 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:20,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:46:20,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:20,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:20,777 INFO L354 Elim1Store]: treesize reduction 18, result has 51.4 percent of original size [2021-05-03 16:46:20,778 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 37 [2021-05-03 16:46:20,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:20,960 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-05-03 16:46:20,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 43 [2021-05-03 16:46:20,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:20,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,096 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:21,096 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 55 [2021-05-03 16:46:21,132 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,226 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:46:21,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:21,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-05-03 16:46:21,409 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,527 INFO L354 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2021-05-03 16:46:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 25 [2021-05-03 16:46:21,534 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,610 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-05-03 16:46:21,614 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,692 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-05-03 16:46:21,696 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,771 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,771 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 1 [2021-05-03 16:46:21,774 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,845 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 1 [2021-05-03 16:46:21,849 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,912 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:46:21,915 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:21,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:46:21,955 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-05-03 16:46:21,956 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 1 [2021-05-03 16:46:21,959 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:22,514 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-05-03 16:46:22,515 INFO L628 ElimStorePlain]: treesize reduction 122, result has 50.6 percent of original size [2021-05-03 16:46:22,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:46:22,519 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:737, output treesize:125 [2021-05-03 16:46:22,814 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-03 16:46:23,100 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 16:46:23,258 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 16:46:23,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:23,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-03 16:46:23,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285559923] [2021-05-03 16:46:23,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:46:23,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:46:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:46:23,259 INFO L87 Difference]: Start difference. First operand 2486 states and 8515 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:23,646 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-05-03 16:46:24,434 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2021-05-03 16:46:24,996 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-03 16:46:25,606 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 16:46:26,332 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-05-03 16:46:26,819 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-03 16:46:27,109 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 16:46:27,461 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-05-03 16:46:27,794 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:46:28,272 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2021-05-03 16:46:28,748 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-05-03 16:46:28,988 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:46:29,610 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 16:46:30,786 WARN L205 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-05-03 16:46:31,126 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:46:31,772 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-05-03 16:46:32,888 WARN L205 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-05-03 16:46:34,363 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-05-03 16:46:35,125 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-05-03 16:46:35,518 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:46:35,850 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:46:37,135 WARN L205 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 16:46:37,487 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-05-03 16:46:37,852 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-05-03 16:46:38,467 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-05-03 16:46:38,878 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:46:39,763 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:46:39,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:46:39,989 INFO L93 Difference]: Finished difference Result 4378 states and 14064 transitions. [2021-05-03 16:46:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:46:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:46:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:46:40,002 INFO L225 Difference]: With dead ends: 4378 [2021-05-03 16:46:40,002 INFO L226 Difference]: Without dead ends: 4312 [2021-05-03 16:46:40,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 15008.1ms TimeCoverageRelationStatistics Valid=599, Invalid=2941, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:46:40,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-05-03 16:46:40,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2482. [2021-05-03 16:46:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 2481 states have (on average 3.4256348246674726) internal successors, (8499), 2481 states have internal predecessors, (8499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 8499 transitions. [2021-05-03 16:46:40,064 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 8499 transitions. Word has length 26 [2021-05-03 16:46:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:46:40,064 INFO L480 AbstractCegarLoop]: Abstraction has 2482 states and 8499 transitions. [2021-05-03 16:46:40,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:46:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 8499 transitions. [2021-05-03 16:46:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:46:40,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:46:40,068 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 16:46:40,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3479 [2021-05-03 16:46:40,269 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:46:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:46:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-05-03 16:46:40,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:46:40,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452974310] [2021-05-03 16:46:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:46:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:46:40,646 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-05-03 16:46:40,913 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:46:41,134 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 16:46:41,325 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 16:46:41,532 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-03 16:46:41,563 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 16:46:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452974310] [2021-05-03 16:46:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598809047] [2021-05-03 16:46:41,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:46:41,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:46:41,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:46:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 16:46:41,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:46:42,468 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:46:42,728 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:46:42,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:42,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-05-03 16:46:42,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,048 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:46:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 27 [2021-05-03 16:46:43,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,091 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:46:43,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,134 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:46:43,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,180 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:46:43,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,282 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:46:43,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:46:43,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,392 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:46:43,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:46:43,406 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,449 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:46:43,455 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:46:43,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:46:43,547 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,590 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:46:43,594 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,633 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,633 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:46:43,637 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,719 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-05-03 16:46:43,720 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-05-03 16:46:43,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,762 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:46:43,766 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,805 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:46:43,810 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,846 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:46:43,850 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:43,874 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:46:43,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:46:43,878 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:46:44,535 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 16:46:44,536 INFO L628 ElimStorePlain]: treesize reduction 89, result has 64.7 percent of original size [2021-05-03 16:46:44,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:46:44,540 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:797, output treesize:163 [2021-05-03 16:46:44,903 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:46:45,453 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 16:46:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:46:45,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:46:45,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-05-03 16:46:45,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965992835] [2021-05-03 16:46:45,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:46:45,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:46:45,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:46:45,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:46:45,634 INFO L87 Difference]: Start difference. First operand 2482 states and 8499 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 16:46:46,064 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-05-03 16:46:47,182 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-05-03 16:46:47,458 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-05-03 16:46:47,775 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-05-03 16:46:48,358 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:46:48,890 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:46:49,568 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-05-03 16:46:50,286 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-05-03 16:46:50,456 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:46:51,246 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:46:51,777 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-05-03 16:46:51,969 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:46:52,765 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-03 16:46:54,022 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-05-03 16:46:54,926 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-05-03 16:46:56,315 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-05-03 16:46:57,462 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-05-03 16:46:58,486 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-05-03 16:46:59,216 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2021-05-03 16:47:00,432 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-05-03 16:47:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:01,393 INFO L93 Difference]: Finished difference Result 3286 states and 10847 transitions. [2021-05-03 16:47:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:47:01,398 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 16:47:01,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:01,404 INFO L225 Difference]: With dead ends: 3286 [2021-05-03 16:47:01,404 INFO L226 Difference]: Without dead ends: 3211 [2021-05-03 16:47:01,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 14577.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:47:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-05-03 16:47:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2529. [2021-05-03 16:47:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2528 states have (on average 3.410601265822785) internal successors, (8622), 2528 states have internal predecessors, (8622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 8622 transitions. [2021-05-03 16:47:01,440 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 8622 transitions. Word has length 26 [2021-05-03 16:47:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:01,440 INFO L480 AbstractCegarLoop]: Abstraction has 2529 states and 8622 transitions. [2021-05-03 16:47:01,441 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 16:47:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 8622 transitions. [2021-05-03 16:47:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:01,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:01,444 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 16:47:01,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:01,645 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:01,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:01,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-05-03 16:47:01,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:01,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833639365] [2021-05-03 16:47:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:02,106 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-03 16:47:02,549 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-03 16:47:02,914 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-03 16:47:03,052 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-05-03 16:47:03,116 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 16:47:03,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833639365] [2021-05-03 16:47:03,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97842670] [2021-05-03 16:47:03,116 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:03,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:03,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:47:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:03,497 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-05-03 16:47:03,841 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:04,497 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:47:04,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:05,053 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:47:05,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:47:05,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:05,118 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:47:05,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:47:05,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:06,539 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-05-03 16:47:06,540 INFO L628 ElimStorePlain]: treesize reduction 120, result has 75.8 percent of original size [2021-05-03 16:47:06,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:06,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:06,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:47:06,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:07,958 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 149 DAG size of output: 144 [2021-05-03 16:47:07,959 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-05-03 16:47:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:08,057 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:47:08,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:47:08,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:08,699 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-05-03 16:47:08,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:08,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:08,785 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:47:08,785 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 25 [2021-05-03 16:47:08,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:09,435 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-05-03 16:47:09,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:09,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:09,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:47:09,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:09,607 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:47:09,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:09,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:10,746 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 132 DAG size of output: 126 [2021-05-03 16:47:10,748 INFO L628 ElimStorePlain]: treesize reduction 32, result has 89.5 percent of original size [2021-05-03 16:47:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:10,836 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:47:10,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:47:10,845 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,323 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-05-03 16:47:11,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:11,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,398 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:47:11,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,924 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:47:11,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:11,999 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:47:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:47:12,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,410 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-03 16:47:12,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:12,468 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 16:47:12,468 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:232 [2021-05-03 16:47:13,179 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-05-03 16:47:13,333 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 16:47:13,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:13,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:47:13,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978581213] [2021-05-03 16:47:13,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:13,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:13,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:13,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:13,334 INFO L87 Difference]: Start difference. First operand 2529 states and 8622 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 16:47:13,775 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 18 [2021-05-03 16:47:14,757 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-05-03 16:47:15,550 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 27 [2021-05-03 16:47:15,841 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-05-03 16:47:16,221 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:16,688 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:47:17,261 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:47:17,557 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-03 16:47:18,020 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:47:18,569 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-05-03 16:47:18,744 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:19,427 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:47:20,108 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:47:20,800 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 16:47:21,428 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-05-03 16:47:21,891 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-05-03 16:47:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:21,951 INFO L93 Difference]: Finished difference Result 3700 states and 12266 transitions. [2021-05-03 16:47:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:47:21,954 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 16:47:21,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:21,960 INFO L225 Difference]: With dead ends: 3700 [2021-05-03 16:47:21,960 INFO L226 Difference]: Without dead ends: 3670 [2021-05-03 16:47:21,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 9739.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:47:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-05-03 16:47:21,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2539. [2021-05-03 16:47:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 3.4109535066981875) internal successors, (8657), 2538 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 8657 transitions. [2021-05-03 16:47:21,992 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 8657 transitions. Word has length 26 [2021-05-03 16:47:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:21,993 INFO L480 AbstractCegarLoop]: Abstraction has 2539 states and 8657 transitions. [2021-05-03 16:47:21,993 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 16:47:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 8657 transitions. [2021-05-03 16:47:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:21,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:21,995 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 16:47:22,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:22,196 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:22,196 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-05-03 16:47:22,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:22,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715292334] [2021-05-03 16:47:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:22,573 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-05-03 16:47:22,781 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 16:47:22,979 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-05-03 16:47:23,143 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-05-03 16:47:23,219 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 16:47:23,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715292334] [2021-05-03 16:47:23,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599152962] [2021-05-03 16:47:23,219 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:23,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:47:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:23,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:47:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:24,188 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:24,857 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-05-03 16:47:25,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:25,491 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:25,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:47:25,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:25,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:25,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:47:25,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:26,928 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-05-03 16:47:26,929 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.1 percent of original size [2021-05-03 16:47:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:26,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:26,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:47:26,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:27,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:27,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:47:27,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,355 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-05-03 16:47:28,357 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.6 percent of original size [2021-05-03 16:47:28,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:28,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:47:28,432 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:28,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:28,486 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:28,486 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 16:47:28,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:29,137 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:47:29,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:29,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:29,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:29,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:47:29,212 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:29,267 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:29,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:47:29,273 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:29,849 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-05-03 16:47:29,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:29,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:29,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:29,907 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 26 treesize of output 24 [2021-05-03 16:47:29,914 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:29,960 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:47:29,968 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:30,548 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:47:30,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:30,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:47:30,566 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:387, output treesize:170 [2021-05-03 16:47:31,006 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-05-03 16:47:31,266 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 16:47:31,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:31,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:47:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702207554] [2021-05-03 16:47:31,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:47:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:47:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:47:31,267 INFO L87 Difference]: Start difference. First operand 2539 states and 8657 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 16:47:31,541 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-05-03 16:47:31,910 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-05-03 16:47:32,435 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-05-03 16:47:33,087 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:33,267 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:47:33,695 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:47:33,952 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:47:34,784 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:47:35,119 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:47:35,675 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-03 16:47:36,127 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-05-03 16:47:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:36,329 INFO L93 Difference]: Finished difference Result 3295 states and 11019 transitions. [2021-05-03 16:47:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:47:36,332 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 16:47:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:36,339 INFO L225 Difference]: With dead ends: 3295 [2021-05-03 16:47:36,339 INFO L226 Difference]: Without dead ends: 3270 [2021-05-03 16:47:36,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 6132.8ms TimeCoverageRelationStatistics Valid=251, Invalid=1009, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:47:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2021-05-03 16:47:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 2544. [2021-05-03 16:47:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 3.4117184427841134) internal successors, (8676), 2543 states have internal predecessors, (8676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:36,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 8676 transitions. [2021-05-03 16:47:36,373 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 8676 transitions. Word has length 26 [2021-05-03 16:47:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:36,373 INFO L480 AbstractCegarLoop]: Abstraction has 2544 states and 8676 transitions. [2021-05-03 16:47:36,373 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 16:47:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 8676 transitions. [2021-05-03 16:47:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:36,376 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:36,377 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 16:47:36,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:36,577 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-05-03 16:47:36,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:36,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325538470] [2021-05-03 16:47:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:36,864 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 16:47:37,082 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 16:47:37,481 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 16:47:37,653 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 16:47:37,792 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 16:47:37,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325538470] [2021-05-03 16:47:37,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297401034] [2021-05-03 16:47:37,792 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:37,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:47:37,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:38,381 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:47:38,620 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:47:38,964 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:47:40,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:40,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:40,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:47:40,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:47:40,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:40,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:40,711 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:40,745 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:47:40,776 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:40,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:47:40,840 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:47:40,886 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:40,927 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:47:40,969 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:40,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:40,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:40,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:41,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:41,007 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 28 treesize of output 13 [2021-05-03 16:47:41,012 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:41,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:41,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:41,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:41,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:47:41,041 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:41,187 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-05-03 16:47:41,189 INFO L628 ElimStorePlain]: treesize reduction 26, result has 44.7 percent of original size [2021-05-03 16:47:41,194 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 16:47:41,195 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:47:41,341 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 16:47:41,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:41,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:47:41,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031574746] [2021-05-03 16:47:41,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:47:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:47:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:47:41,342 INFO L87 Difference]: Start difference. First operand 2544 states and 8676 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 16:47:41,525 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2021-05-03 16:47:41,755 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-05-03 16:47:41,917 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 15 [2021-05-03 16:47:42,120 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-05-03 16:47:42,414 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 22 [2021-05-03 16:47:42,682 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-05-03 16:47:43,314 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 18 [2021-05-03 16:47:43,666 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 16:47:43,863 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:47:44,124 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:47:44,380 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-05-03 16:47:44,804 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-05-03 16:47:45,241 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-05-03 16:47:46,102 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:47:46,502 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-05-03 16:47:46,979 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-05-03 16:47:47,253 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:47:47,938 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-03 16:47:48,541 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:47:49,288 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:47:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:49,415 INFO L93 Difference]: Finished difference Result 3486 states and 11580 transitions. [2021-05-03 16:47:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:47:49,419 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 16:47:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:49,427 INFO L225 Difference]: With dead ends: 3486 [2021-05-03 16:47:49,427 INFO L226 Difference]: Without dead ends: 3449 [2021-05-03 16:47:49,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 8118.3ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:47:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-05-03 16:47:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2605. [2021-05-03 16:47:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 3.4166666666666665) internal successors, (8897), 2604 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 8897 transitions. [2021-05-03 16:47:49,467 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 8897 transitions. Word has length 26 [2021-05-03 16:47:49,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:49,467 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 8897 transitions. [2021-05-03 16:47:49,468 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 16:47:49,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 8897 transitions. [2021-05-03 16:47:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:49,471 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:49,471 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 16:47:49,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3625,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:49,672 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:49,672 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-05-03 16:47:49,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:49,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113356106] [2021-05-03 16:47:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:49,911 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-03 16:47:50,314 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 16:47:50,451 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 16:47:50,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113356106] [2021-05-03 16:47:50,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191879320] [2021-05-03 16:47:50,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:50,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:50,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:47:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:50,946 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:47:51,140 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:47:51,681 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-05-03 16:47:51,910 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_404, v_prenex_402], 5=[A, v_prenex_406]} [2021-05-03 16:47:51,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:51,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:51,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:47:51,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:51,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:51,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-05-03 16:47:51,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,534 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-05-03 16:47:52,536 INFO L628 ElimStorePlain]: treesize reduction 153, result has 42.0 percent of original size [2021-05-03 16:47:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:47:52,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,715 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:47:52,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:52,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:47:52,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,867 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:47:52,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:52,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:52,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:47:52,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:53,018 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:47:53,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:53,030 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 16:47:53,030 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:29 [2021-05-03 16:47:53,262 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 16:47:53,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:53,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:47:53,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212138384] [2021-05-03 16:47:53,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:53,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:53,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:53,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:53,263 INFO L87 Difference]: Start difference. First operand 2605 states and 8897 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 16:47:53,596 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-05-03 16:47:53,872 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:47:54,270 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 18 [2021-05-03 16:47:54,646 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 16:47:54,883 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:47:55,344 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-05-03 16:47:55,677 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-03 16:47:55,977 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2021-05-03 16:47:56,413 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:47:57,706 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 16:47:58,030 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:47:58,385 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 16:47:59,053 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-05-03 16:47:59,557 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-05-03 16:48:00,124 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:48:00,457 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-05-03 16:48:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:01,016 INFO L93 Difference]: Finished difference Result 3604 states and 12006 transitions. [2021-05-03 16:48:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:48:01,018 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 16:48:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:01,025 INFO L225 Difference]: With dead ends: 3604 [2021-05-03 16:48:01,025 INFO L226 Difference]: Without dead ends: 3564 [2021-05-03 16:48:01,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 6926.1ms TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 16:48:01,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-05-03 16:48:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2583. [2021-05-03 16:48:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 2582 states have (on average 3.4155693261037956) internal successors, (8819), 2582 states have internal predecessors, (8819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 8819 transitions. [2021-05-03 16:48:01,066 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 8819 transitions. Word has length 26 [2021-05-03 16:48:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:01,066 INFO L480 AbstractCegarLoop]: Abstraction has 2583 states and 8819 transitions. [2021-05-03 16:48:01,066 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 16:48:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 8819 transitions. [2021-05-03 16:48:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:01,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:01,072 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 16:48:01,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-05-03 16:48:01,273 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-05-03 16:48:01,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:01,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128866128] [2021-05-03 16:48:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:01,674 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:48:01,906 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:48:02,300 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 16:48:02,456 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 16:48:02,523 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 16:48:02,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128866128] [2021-05-03 16:48:02,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25964876] [2021-05-03 16:48:02,523 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:02,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:48:02,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:02,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:48:02,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:03,290 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:48:03,684 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-05-03 16:48:04,528 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:48:05,223 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-05-03 16:48:05,224 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:48:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 32 [2021-05-03 16:48:05,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:05,283 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-05-03 16:48:05,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16 [2021-05-03 16:48:05,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:07,141 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 159 DAG size of output: 155 [2021-05-03 16:48:07,142 INFO L628 ElimStorePlain]: treesize reduction 78, result has 85.1 percent of original size [2021-05-03 16:48:07,327 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 16:48:07,329 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-05-03 16:48:07,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:48:07,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:09,196 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 155 DAG size of output: 150 [2021-05-03 16:48:09,197 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.9 percent of original size [2021-05-03 16:48:09,321 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-05-03 16:48:09,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:48:09,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:09,463 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 16:48:09,464 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-05-03 16:48:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-05-03 16:48:09,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:11,015 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 151 DAG size of output: 149 [2021-05-03 16:48:11,016 INFO L628 ElimStorePlain]: treesize reduction 37, result has 91.1 percent of original size [2021-05-03 16:48:11,154 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 10 [2021-05-03 16:48:11,156 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-05-03 16:48:11,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:48:11,163 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:11,944 WARN L205 SmtUtils]: Spent 779.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-05-03 16:48:11,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:12,110 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-05-03 16:48:12,112 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:48:12,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:48:12,119 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:12,968 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-03 16:48:12,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:13,142 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 16:48:13,143 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-05-03 16:48:13,143 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 30 treesize of output 36 [2021-05-03 16:48:13,165 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:13,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:13,272 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 30 treesize of output 40 [2021-05-03 16:48:13,289 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:14,818 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 147 DAG size of output: 138 [2021-05-03 16:48:14,820 INFO L628 ElimStorePlain]: treesize reduction 51, result has 86.0 percent of original size [2021-05-03 16:48:14,975 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2021-05-03 16:48:14,977 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-05-03 16:48:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:48:14,998 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:15,721 WARN L205 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-05-03 16:48:15,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:15,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:15,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:48:15,834 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:16,394 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-03 16:48:16,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:16,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:48:16,476 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:587, output treesize:687 [2021-05-03 16:48:18,107 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-05-03 16:48:18,923 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 16:48:19,149 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 16:48:19,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:19,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:48:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121910320] [2021-05-03 16:48:19,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:48:19,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:48:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:48:19,150 INFO L87 Difference]: Start difference. First operand 2583 states and 8819 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 16:48:19,631 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 25 [2021-05-03 16:48:20,042 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 26 [2021-05-03 16:48:21,523 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 16:48:21,709 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-05-03 16:48:22,556 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-05-03 16:48:23,001 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-05-03 16:48:24,181 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-05-03 16:48:25,917 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-05-03 16:48:26,623 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-05-03 16:48:27,406 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 46 [2021-05-03 16:48:28,051 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:48:30,298 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-05-03 16:48:30,790 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-05-03 16:48:32,663 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 114 DAG size of output: 86 [2021-05-03 16:48:33,556 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:48:34,512 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-05-03 16:48:36,105 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 105 DAG size of output: 68 [2021-05-03 16:48:37,329 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-05-03 16:48:39,872 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 157 DAG size of output: 93 [2021-05-03 16:48:41,484 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-05-03 16:48:42,761 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-05-03 16:48:44,289 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-05-03 16:48:46,812 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 139 DAG size of output: 91 [2021-05-03 16:48:48,572 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-05-03 16:48:49,609 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 20 [2021-05-03 16:48:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:49,962 INFO L93 Difference]: Finished difference Result 3689 states and 12212 transitions. [2021-05-03 16:48:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:48:49,966 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 16:48:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:49,974 INFO L225 Difference]: With dead ends: 3689 [2021-05-03 16:48:49,974 INFO L226 Difference]: Without dead ends: 3674 [2021-05-03 16:48:49,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 30505.3ms TimeCoverageRelationStatistics Valid=377, Invalid=1693, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:48:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2021-05-03 16:48:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 2577. [2021-05-03 16:48:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 3.415372670807453) internal successors, (8798), 2576 states have internal predecessors, (8798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 8798 transitions. [2021-05-03 16:48:50,015 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 8798 transitions. Word has length 26 [2021-05-03 16:48:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:50,015 INFO L480 AbstractCegarLoop]: Abstraction has 2577 states and 8798 transitions. [2021-05-03 16:48:50,015 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 16:48:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 8798 transitions. [2021-05-03 16:48:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:50,018 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:50,018 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 16:48:50,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3753,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:50,219 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 49 times [2021-05-03 16:48:50,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:50,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563400170] [2021-05-03 16:48:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:50,792 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-05-03 16:48:51,140 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-05-03 16:48:51,610 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-05-03 16:48:51,845 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-05-03 16:48:51,927 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 16:48:51,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563400170] [2021-05-03 16:48:51,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852462256] [2021-05-03 16:48:51,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:48:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:52,471 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-03 16:48:52,908 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:48:53,878 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-03 16:48:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:55,319 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:55,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:48:55,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:55,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:55,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:48:55,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:57,326 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-05-03 16:48:57,327 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-05-03 16:48:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:57,469 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:57,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:48:57,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:57,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:57,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:57,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:48:57,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,416 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-05-03 16:48:59,417 INFO L628 ElimStorePlain]: treesize reduction 13, result has 96.6 percent of original size [2021-05-03 16:48:59,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:59,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:48:59,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,661 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:59,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:48:59,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:01,322 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2021-05-03 16:49:01,324 INFO L628 ElimStorePlain]: treesize reduction 14, result has 95.9 percent of original size [2021-05-03 16:49:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:01,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:01,425 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 16 treesize of output 26 [2021-05-03 16:49:01,455 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:01,552 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:49:01,560 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:02,402 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:49:02,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:02,544 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:02,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:49:02,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:02,673 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:49:02,694 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:03,499 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-05-03 16:49:03,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:49:03,582 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:247 [2021-05-03 16:49:04,457 WARN L205 SmtUtils]: Spent 769.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-05-03 16:49:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:04,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:04,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:04,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312388757] [2021-05-03 16:49:04,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:04,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:04,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:04,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:04,659 INFO L87 Difference]: Start difference. First operand 2577 states and 8798 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 16:49:04,954 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 18 [2021-05-03 16:49:06,632 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-05-03 16:49:07,381 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 26 [2021-05-03 16:49:07,982 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-03 16:49:08,651 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:49:09,550 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:49:10,220 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-05-03 16:49:11,104 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:49:11,783 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 19 [2021-05-03 16:49:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:11,950 INFO L93 Difference]: Finished difference Result 3359 states and 11259 transitions. [2021-05-03 16:49:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:49:11,956 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 16:49:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:11,964 INFO L225 Difference]: With dead ends: 3359 [2021-05-03 16:49:11,964 INFO L226 Difference]: Without dead ends: 3334 [2021-05-03 16:49:11,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 9185.0ms TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:49:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-05-03 16:49:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2570. [2021-05-03 16:49:11,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 3.41300116776956) internal successors, (8768), 2569 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 8768 transitions. [2021-05-03 16:49:12,003 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 8768 transitions. Word has length 26 [2021-05-03 16:49:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:12,003 INFO L480 AbstractCegarLoop]: Abstraction has 2570 states and 8768 transitions. [2021-05-03 16:49:12,003 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 16:49:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 8768 transitions. [2021-05-03 16:49:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:12,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:12,007 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 16:49:12,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-05-03 16:49:12,208 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1815461431, now seen corresponding path program 50 times [2021-05-03 16:49:12,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:12,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446472843] [2021-05-03 16:49:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:12,707 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:49:12,975 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-05-03 16:49:13,280 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-05-03 16:49:13,448 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 16:49:13,596 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2021-05-03 16:49:13,636 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 16:49:13,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446472843] [2021-05-03 16:49:13,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305619056] [2021-05-03 16:49:13,636 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:13,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:13,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:49:13,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:14,351 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-03 16:49:14,633 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:49:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:14,814 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:14,815 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 28 treesize of output 16 [2021-05-03 16:49:14,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:14,876 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:14,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:49:14,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:14,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:14,917 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:14,918 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 33 treesize of output 19 [2021-05-03 16:49:14,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:14,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:14,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:49:14,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:14,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,024 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:49:15,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,088 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:15,088 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 21 treesize of output 17 [2021-05-03 16:49:15,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:15,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:49:15,173 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,213 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:49:15,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,265 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,266 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 35 treesize of output 1 [2021-05-03 16:49:15,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,310 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:49:15,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:15,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:49:15,409 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 16:49:15,458 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,516 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:15,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:49:15,522 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,559 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,559 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 16 [2021-05-03 16:49:15,564 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,616 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:15,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 23 [2021-05-03 16:49:15,621 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:15,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:15,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:49:15,654 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:16,068 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-03 16:49:16,070 INFO L628 ElimStorePlain]: treesize reduction 51, result has 60.5 percent of original size [2021-05-03 16:49:16,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:49:16,072 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-05-03 16:49:16,331 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-03 16:49:16,499 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 16:49:16,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:16,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:49:16,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070912732] [2021-05-03 16:49:16,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:49:16,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:16,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:49:16,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:49:16,500 INFO L87 Difference]: Start difference. First operand 2570 states and 8768 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 16:49:16,862 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-03 16:49:17,055 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2021-05-03 16:49:17,737 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-05-03 16:49:18,465 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-05-03 16:49:18,760 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-05-03 16:49:19,896 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 16:49:20,346 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-05-03 16:49:21,075 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:49:21,671 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:49:22,060 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-05-03 16:49:22,694 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-05-03 16:49:23,281 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 16:49:23,860 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-03 16:49:24,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:24,720 INFO L93 Difference]: Finished difference Result 3262 states and 10927 transitions. [2021-05-03 16:49:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:49:24,727 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 16:49:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:24,734 INFO L225 Difference]: With dead ends: 3262 [2021-05-03 16:49:24,734 INFO L226 Difference]: Without dead ends: 3220 [2021-05-03 16:49:24,734 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 7466.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 16:49:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-05-03 16:49:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2573. [2021-05-03 16:49:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.4144634525660966) internal successors, (8782), 2572 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 8782 transitions. [2021-05-03 16:49:24,791 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 8782 transitions. Word has length 26 [2021-05-03 16:49:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:24,791 INFO L480 AbstractCegarLoop]: Abstraction has 2573 states and 8782 transitions. [2021-05-03 16:49:24,791 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 16:49:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 8782 transitions. [2021-05-03 16:49:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:24,795 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:24,795 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 16:49:24,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3885,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:24,996 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-05-03 16:49:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:24,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383111995] [2021-05-03 16:49:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:25,385 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-03 16:49:25,645 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-03 16:49:25,997 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 16:49:26,144 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-03 16:49:26,210 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 16:49:26,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383111995] [2021-05-03 16:49:26,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712252077] [2021-05-03 16:49:26,210 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:26,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:26,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:26,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:49:26,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:26,949 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:49:27,676 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-05-03 16:49:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:29,205 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:29,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:49:29,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:29,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:29,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:49:29,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:31,150 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-05-03 16:49:31,151 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-05-03 16:49:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:31,286 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:49:31,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:31,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:31,409 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:49:31,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:32,223 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 16:49:32,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:32,353 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:32,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:49:32,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:32,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:32,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:32,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:49:32,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:33,999 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-05-03 16:49:34,000 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.7 percent of original size [2021-05-03 16:49:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,108 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:49:34,116 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:34,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 16:49:34,204 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,982 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-05-03 16:49:34,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:35,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:35,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:49:35,103 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:35,197 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:35,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:35,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:36,612 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-05-03 16:49:36,614 INFO L628 ElimStorePlain]: treesize reduction 14, result has 95.4 percent of original size [2021-05-03 16:49:36,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:49:36,663 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:461, output treesize:270 [2021-05-03 16:49:37,739 WARN L205 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-05-03 16:49:37,942 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 16:49:37,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:37,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:37,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239399675] [2021-05-03 16:49:37,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:37,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:37,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:37,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:37,944 INFO L87 Difference]: Start difference. First operand 2573 states and 8782 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 16:49:38,200 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 19 [2021-05-03 16:49:39,383 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-05-03 16:49:40,000 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 29 [2021-05-03 16:49:40,495 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 16:49:41,190 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-05-03 16:49:41,979 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-05-03 16:49:42,718 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:49:43,341 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2021-05-03 16:49:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:43,520 INFO L93 Difference]: Finished difference Result 3291 states and 11082 transitions. [2021-05-03 16:49:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:49:43,524 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 16:49:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:43,530 INFO L225 Difference]: With dead ends: 3291 [2021-05-03 16:49:43,530 INFO L226 Difference]: Without dead ends: 3276 [2021-05-03 16:49:43,530 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 7147.9ms TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:49:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-05-03 16:49:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2580. [2021-05-03 16:49:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 2579 states have (on average 3.4164404808065143) internal successors, (8811), 2579 states have internal predecessors, (8811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 8811 transitions. [2021-05-03 16:49:43,563 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 8811 transitions. Word has length 26 [2021-05-03 16:49:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:43,563 INFO L480 AbstractCegarLoop]: Abstraction has 2580 states and 8811 transitions. [2021-05-03 16:49:43,563 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 16:49:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 8811 transitions. [2021-05-03 16:49:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:43,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:43,567 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 16:49:43,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3904 [2021-05-03 16:49:43,767 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-05-03 16:49:43,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:43,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322065889] [2021-05-03 16:49:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:44,037 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 16:49:44,223 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-05-03 16:49:44,374 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-05-03 16:49:44,624 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 16:49:44,798 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 16:49:44,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322065889] [2021-05-03 16:49:44,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892374139] [2021-05-03 16:49:44,799 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:44,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:44,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:49:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:45,326 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:49:45,551 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-03 16:49:45,826 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-03 16:49:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:46,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,084 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:49:47,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-05-03 16:49:47,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:47,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,274 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:49:47,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 31 [2021-05-03 16:49:47,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:47,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,454 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:49:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-05-03 16:49:47,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:47,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,557 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:49:47,562 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:47,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,710 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:49:47,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:49:47,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,853 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:49:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:49:47,860 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:47,999 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:49:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-05-03 16:49:48,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,085 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:48,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:49:48,090 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,173 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:48,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:49:48,178 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,269 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:48,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:49:48,275 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,435 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:49:48,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:49:48,441 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:48,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 16:49:48,652 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,759 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:49:48,765 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:48,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-05-03 16:49:48,958 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,038 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:49,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:49:49,042 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,091 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:49:49,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 16:49:49,095 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,775 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-05-03 16:49:49,776 INFO L628 ElimStorePlain]: treesize reduction 121, result has 40.1 percent of original size [2021-05-03 16:49:49,784 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 16:49:49,785 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-05-03 16:49:50,020 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-03 16:49:50,279 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 16:49:50,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:50,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:49:50,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142088889] [2021-05-03 16:49:50,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:49:50,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:49:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:49:50,280 INFO L87 Difference]: Start difference. First operand 2580 states and 8811 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 16:49:50,587 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 16:49:50,898 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2021-05-03 16:49:51,117 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 18 [2021-05-03 16:49:51,404 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 20 [2021-05-03 16:49:51,745 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-05-03 16:49:52,105 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-05-03 16:49:52,357 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2021-05-03 16:49:53,102 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2021-05-03 16:49:53,569 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-05-03 16:49:54,073 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:49:54,751 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-05-03 16:49:55,137 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 16:49:55,650 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-05-03 16:49:56,018 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-05-03 16:49:56,308 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:49:56,997 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 16:49:57,434 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-05-03 16:49:57,750 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-05-03 16:49:58,169 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-03 16:49:58,415 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:49:58,959 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-05-03 16:49:59,291 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:50:00,401 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-05-03 16:50:00,874 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-05-03 16:50:01,348 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:50:01,928 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-05-03 16:50:02,580 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-03 16:50:03,546 WARN L205 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 16:50:03,967 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-05-03 16:50:04,691 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-05-03 16:50:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:05,178 INFO L93 Difference]: Finished difference Result 3871 states and 12786 transitions. [2021-05-03 16:50:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 16:50:05,183 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 16:50:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:05,190 INFO L225 Difference]: With dead ends: 3871 [2021-05-03 16:50:05,190 INFO L226 Difference]: Without dead ends: 3827 [2021-05-03 16:50:05,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 13181.1ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 16:50:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-05-03 16:50:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2596. [2021-05-03 16:50:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 3.4134874759152214) internal successors, (8858), 2595 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:05,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 8858 transitions. [2021-05-03 16:50:05,233 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 8858 transitions. Word has length 26 [2021-05-03 16:50:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:05,233 INFO L480 AbstractCegarLoop]: Abstraction has 2596 states and 8858 transitions. [2021-05-03 16:50:05,233 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 16:50:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 8858 transitions. [2021-05-03 16:50:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:05,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:05,237 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:05,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:05,437 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-05-03 16:50:05,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:05,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087763032] [2021-05-03 16:50:05,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:05,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087763032] [2021-05-03 16:50:05,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321238966] [2021-05-03 16:50:05,616 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:05,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:50:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:50:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:06,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:06,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:50:06,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339284861] [2021-05-03 16:50:06,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:50:06,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:50:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:50:06,144 INFO L87 Difference]: Start difference. First operand 2596 states and 8858 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:10,674 INFO L93 Difference]: Finished difference Result 5601 states and 17562 transitions. [2021-05-03 16:50:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 16:50:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:10,687 INFO L225 Difference]: With dead ends: 5601 [2021-05-03 16:50:10,687 INFO L226 Difference]: Without dead ends: 5601 [2021-05-03 16:50:10,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2633.4ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 16:50:10,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-05-03 16:50:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 2793. [2021-05-03 16:50:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.455945558739255) internal successors, (9649), 2792 states have internal predecessors, (9649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 9649 transitions. [2021-05-03 16:50:10,742 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 9649 transitions. Word has length 28 [2021-05-03 16:50:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:10,742 INFO L480 AbstractCegarLoop]: Abstraction has 2793 states and 9649 transitions. [2021-05-03 16:50:10,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 9649 transitions. [2021-05-03 16:50:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:10,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:10,746 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:10,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4087 [2021-05-03 16:50:10,947 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:10,947 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-05-03 16:50:10,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:10,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027315600] [2021-05-03 16:50:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027315600] [2021-05-03 16:50:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410127595] [2021-05-03 16:50:11,154 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:11,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:50:11,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:50:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:11,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:11,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 16:50:11,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309721048] [2021-05-03 16:50:11,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:50:11,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:11,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:50:11,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:50:11,800 INFO L87 Difference]: Start difference. First operand 2793 states and 9649 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 16:50:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:17,684 INFO L93 Difference]: Finished difference Result 7300 states and 22489 transitions. [2021-05-03 16:50:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-03 16:50:17,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:17,703 INFO L225 Difference]: With dead ends: 7300 [2021-05-03 16:50:17,703 INFO L226 Difference]: Without dead ends: 7300 [2021-05-03 16:50:17,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 3483.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-05-03 16:50:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7300 states. [2021-05-03 16:50:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7300 to 2807. [2021-05-03 16:50:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.462936564504633) internal successors, (9717), 2806 states have internal predecessors, (9717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:17,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9717 transitions. [2021-05-03 16:50:17,773 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9717 transitions. Word has length 28 [2021-05-03 16:50:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:17,774 INFO L480 AbstractCegarLoop]: Abstraction has 2807 states and 9717 transitions. [2021-05-03 16:50:17,774 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 16:50:17,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9717 transitions. [2021-05-03 16:50:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:17,777 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:17,777 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:17,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4088,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:17,978 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:17,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:17,978 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-05-03 16:50:17,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:17,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122659118] [2021-05-03 16:50:17,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:18,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122659118] [2021-05-03 16:50:18,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058905829] [2021-05-03 16:50:18,190 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:18,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:50:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:18,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:50:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:18,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:18,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 16:50:18,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019338401] [2021-05-03 16:50:18,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 16:50:18,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 16:50:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-03 16:50:18,883 INFO L87 Difference]: Start difference. First operand 2807 states and 9717 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 16:50:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:24,476 INFO L93 Difference]: Finished difference Result 6694 states and 21022 transitions. [2021-05-03 16:50:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 16:50:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:24,494 INFO L225 Difference]: With dead ends: 6694 [2021-05-03 16:50:24,494 INFO L226 Difference]: Without dead ends: 6694 [2021-05-03 16:50:24,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3431.7ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 16:50:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6694 states. [2021-05-03 16:50:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6694 to 2752. [2021-05-03 16:50:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 3.4427480916030535) internal successors, (9471), 2751 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 9471 transitions. [2021-05-03 16:50:24,575 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 9471 transitions. Word has length 28 [2021-05-03 16:50:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:24,575 INFO L480 AbstractCegarLoop]: Abstraction has 2752 states and 9471 transitions. [2021-05-03 16:50:24,575 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 16:50:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 9471 transitions. [2021-05-03 16:50:24,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:24,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:24,580 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:24,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-05-03 16:50:24,781 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-05-03 16:50:24,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:24,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728056427] [2021-05-03 16:50:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:24,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728056427] [2021-05-03 16:50:24,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814147193] [2021-05-03 16:50:24,975 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:24,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:50:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:25,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:25,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:50:25,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377282745] [2021-05-03 16:50:25,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:50:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:50:25,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:50:25,677 INFO L87 Difference]: Start difference. First operand 2752 states and 9471 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:31,338 INFO L93 Difference]: Finished difference Result 5694 states and 17746 transitions. [2021-05-03 16:50:31,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 16:50:31,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:31,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:31,355 INFO L225 Difference]: With dead ends: 5694 [2021-05-03 16:50:31,355 INFO L226 Difference]: Without dead ends: 5694 [2021-05-03 16:50:31,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 3247.9ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:50:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-05-03 16:50:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 2773. [2021-05-03 16:50:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2773 states, 2772 states have (on average 3.4386724386724388) internal successors, (9532), 2772 states have internal predecessors, (9532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:31,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 9532 transitions. [2021-05-03 16:50:31,436 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 9532 transitions. Word has length 28 [2021-05-03 16:50:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:31,437 INFO L480 AbstractCegarLoop]: Abstraction has 2773 states and 9532 transitions. [2021-05-03 16:50:31,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 9532 transitions. [2021-05-03 16:50:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:31,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:31,440 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:31,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-05-03 16:50:31,642 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:31,643 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 64 times [2021-05-03 16:50:31,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:31,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850357702] [2021-05-03 16:50:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850357702] [2021-05-03 16:50:31,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434507263] [2021-05-03 16:50:31,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:31,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:50:31,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:31,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:50:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:32,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:32,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 16:50:32,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654192923] [2021-05-03 16:50:32,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:50:32,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:50:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:50:32,395 INFO L87 Difference]: Start difference. First operand 2773 states and 9532 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:35,226 INFO L93 Difference]: Finished difference Result 5097 states and 16096 transitions. [2021-05-03 16:50:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:50:35,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:35,237 INFO L225 Difference]: With dead ends: 5097 [2021-05-03 16:50:35,238 INFO L226 Difference]: Without dead ends: 5097 [2021-05-03 16:50:35,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1565.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:50:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5097 states. [2021-05-03 16:50:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5097 to 2843. [2021-05-03 16:50:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2842 states have (on average 3.425404644616467) internal successors, (9735), 2842 states have internal predecessors, (9735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 9735 transitions. [2021-05-03 16:50:35,313 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 9735 transitions. Word has length 28 [2021-05-03 16:50:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:35,313 INFO L480 AbstractCegarLoop]: Abstraction has 2843 states and 9735 transitions. [2021-05-03 16:50:35,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 9735 transitions. [2021-05-03 16:50:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:35,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:35,318 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, 1, 1] [2021-05-03 16:50:35,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4091,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:35,519 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-05-03 16:50:35,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:35,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021916736] [2021-05-03 16:50:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:50:35,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021916736] [2021-05-03 16:50:35,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863566284] [2021-05-03 16:50:35,655 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:35,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:50:35,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:35,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:50:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:50:36,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:36,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:50:36,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223730040] [2021-05-03 16:50:36,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:50:36,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:50:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:50:36,089 INFO L87 Difference]: Start difference. First operand 2843 states and 9735 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:36,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:36,972 INFO L93 Difference]: Finished difference Result 4373 states and 14302 transitions. [2021-05-03 16:50:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:50:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:36,985 INFO L225 Difference]: With dead ends: 4373 [2021-05-03 16:50:36,985 INFO L226 Difference]: Without dead ends: 4325 [2021-05-03 16:50:36,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:50:36,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2021-05-03 16:50:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 3137. [2021-05-03 16:50:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 3.4878826530612246) internal successors, (10938), 3136 states have internal predecessors, (10938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 10938 transitions. [2021-05-03 16:50:37,039 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 10938 transitions. Word has length 28 [2021-05-03 16:50:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:37,039 INFO L480 AbstractCegarLoop]: Abstraction has 3137 states and 10938 transitions. [2021-05-03 16:50:37,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 10938 transitions. [2021-05-03 16:50:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:37,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:37,044 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, 1, 1] [2021-05-03 16:50:37,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4092,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:37,245 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-05-03 16:50:37,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:37,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530766858] [2021-05-03 16:50:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:37,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530766858] [2021-05-03 16:50:37,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305125521] [2021-05-03 16:50:37,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:37,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:50:37,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:37,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:50:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:37,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 16:50:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129918844] [2021-05-03 16:50:37,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:50:37,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:50:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:50:37,879 INFO L87 Difference]: Start difference. First operand 3137 states and 10938 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:40,774 INFO L93 Difference]: Finished difference Result 4923 states and 15857 transitions. [2021-05-03 16:50:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 16:50:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:40,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:40,786 INFO L225 Difference]: With dead ends: 4923 [2021-05-03 16:50:40,786 INFO L226 Difference]: Without dead ends: 4876 [2021-05-03 16:50:40,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1687.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 16:50:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-05-03 16:50:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3295. [2021-05-03 16:50:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 3.5066788099574984) internal successors, (11551), 3294 states have internal predecessors, (11551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 11551 transitions. [2021-05-03 16:50:40,839 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 11551 transitions. Word has length 28 [2021-05-03 16:50:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 3295 states and 11551 transitions. [2021-05-03 16:50:40,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 11551 transitions. [2021-05-03 16:50:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:40,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:40,844 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, 1, 1] [2021-05-03 16:50:41,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4093 [2021-05-03 16:50:41,045 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:41,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-05-03 16:50:41,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:41,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549148734] [2021-05-03 16:50:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549148734] [2021-05-03 16:50:41,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585171811] [2021-05-03 16:50:41,169 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:41,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:50:41,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:41,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:50:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:41,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:41,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 16:50:41,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608279999] [2021-05-03 16:50:41,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:50:41,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:50:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:50:41,713 INFO L87 Difference]: Start difference. First operand 3295 states and 11551 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:45,225 INFO L93 Difference]: Finished difference Result 5219 states and 16519 transitions. [2021-05-03 16:50:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:50:45,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:45,241 INFO L225 Difference]: With dead ends: 5219 [2021-05-03 16:50:45,241 INFO L226 Difference]: Without dead ends: 5193 [2021-05-03 16:50:45,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2107.7ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:50:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2021-05-03 16:50:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3316. [2021-05-03 16:50:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 3.5122171945701357) internal successors, (11643), 3315 states have internal predecessors, (11643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 11643 transitions. [2021-05-03 16:50:45,306 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 11643 transitions. Word has length 28 [2021-05-03 16:50:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:45,306 INFO L480 AbstractCegarLoop]: Abstraction has 3316 states and 11643 transitions. [2021-05-03 16:50:45,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 11643 transitions. [2021-05-03 16:50:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:45,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:45,312 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, 1, 1] [2021-05-03 16:50:45,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4094,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:45,512 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-05-03 16:50:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:45,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409109394] [2021-05-03 16:50:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:45,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409109394] [2021-05-03 16:50:45,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063275735] [2021-05-03 16:50:45,682 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:45,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:50:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:50:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:46,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:46,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 16:50:46,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308154433] [2021-05-03 16:50:46,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:50:46,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:50:46,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:50:46,247 INFO L87 Difference]: Start difference. First operand 3316 states and 11643 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:49,753 INFO L93 Difference]: Finished difference Result 5223 states and 16551 transitions. [2021-05-03 16:50:49,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:50:49,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:49,767 INFO L225 Difference]: With dead ends: 5223 [2021-05-03 16:50:49,767 INFO L226 Difference]: Without dead ends: 5205 [2021-05-03 16:50:49,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2203.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:50:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5205 states. [2021-05-03 16:50:49,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5205 to 3313. [2021-05-03 16:50:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 3.506340579710145) internal successors, (11613), 3312 states have internal predecessors, (11613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 11613 transitions. [2021-05-03 16:50:49,826 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 11613 transitions. Word has length 28 [2021-05-03 16:50:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:49,826 INFO L480 AbstractCegarLoop]: Abstraction has 3313 states and 11613 transitions. [2021-05-03 16:50:49,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 11613 transitions. [2021-05-03 16:50:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:49,831 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:49,831 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, 1, 1] [2021-05-03 16:50:50,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-05-03 16:50:50,031 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:50,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-05-03 16:50:50,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:50,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144657469] [2021-05-03 16:50:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:50,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144657469] [2021-05-03 16:50:50,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056823457] [2021-05-03 16:50:50,189 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:50,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:50:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:50,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:50:50,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:50,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:50,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:50:50,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105501935] [2021-05-03 16:50:50,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:50:50,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:50,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:50:50,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:50:50,742 INFO L87 Difference]: Start difference. First operand 3313 states and 11613 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:53,537 INFO L93 Difference]: Finished difference Result 6019 states and 19405 transitions. [2021-05-03 16:50:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 16:50:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:53,555 INFO L225 Difference]: With dead ends: 6019 [2021-05-03 16:50:53,556 INFO L226 Difference]: Without dead ends: 5936 [2021-05-03 16:50:53,556 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1681.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:50:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-05-03 16:50:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 3464. [2021-05-03 16:50:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3464 states, 3463 states have (on average 3.541149292520936) internal successors, (12263), 3463 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3464 states to 3464 states and 12263 transitions. [2021-05-03 16:50:53,631 INFO L78 Accepts]: Start accepts. Automaton has 3464 states and 12263 transitions. Word has length 28 [2021-05-03 16:50:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:53,631 INFO L480 AbstractCegarLoop]: Abstraction has 3464 states and 12263 transitions. [2021-05-03 16:50:53,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3464 states and 12263 transitions. [2021-05-03 16:50:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:53,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:53,636 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, 1, 1] [2021-05-03 16:50:53,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-05-03 16:50:53,852 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1607072049, now seen corresponding path program 61 times [2021-05-03 16:50:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:53,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706576269] [2021-05-03 16:50:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:50:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706576269] [2021-05-03 16:50:53,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428559181] [2021-05-03 16:50:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:53,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:50:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:50:54,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:54,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 16:50:54,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554702030] [2021-05-03 16:50:54,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:50:54,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:50:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:50:54,391 INFO L87 Difference]: Start difference. First operand 3464 states and 12263 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:55,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:55,219 INFO L93 Difference]: Finished difference Result 4761 states and 15786 transitions. [2021-05-03 16:50:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:50:55,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:55,234 INFO L225 Difference]: With dead ends: 4761 [2021-05-03 16:50:55,234 INFO L226 Difference]: Without dead ends: 4761 [2021-05-03 16:50:55,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:50:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-05-03 16:50:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3239. [2021-05-03 16:50:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3239 states, 3238 states have (on average 3.523471278567017) internal successors, (11409), 3238 states have internal predecessors, (11409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3239 states to 3239 states and 11409 transitions. [2021-05-03 16:50:55,291 INFO L78 Accepts]: Start accepts. Automaton has 3239 states and 11409 transitions. Word has length 28 [2021-05-03 16:50:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:55,291 INFO L480 AbstractCegarLoop]: Abstraction has 3239 states and 11409 transitions. [2021-05-03 16:50:55,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3239 states and 11409 transitions. [2021-05-03 16:50:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:55,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:55,295 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:55,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-05-03 16:50:55,496 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-05-03 16:50:55,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:55,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245182926] [2021-05-03 16:50:55,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:55,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245182926] [2021-05-03 16:50:55,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424626892] [2021-05-03 16:50:55,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:55,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:50:55,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:50:55,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:56,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:56,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:50:56,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547006962] [2021-05-03 16:50:56,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:50:56,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:56,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:50:56,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:50:56,147 INFO L87 Difference]: Start difference. First operand 3239 states and 11409 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:59,627 INFO L93 Difference]: Finished difference Result 6575 states and 20978 transitions. [2021-05-03 16:50:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 16:50:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:50:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:59,644 INFO L225 Difference]: With dead ends: 6575 [2021-05-03 16:50:59,644 INFO L226 Difference]: Without dead ends: 6575 [2021-05-03 16:50:59,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1917.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:50:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6575 states. [2021-05-03 16:50:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6575 to 3257. [2021-05-03 16:50:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3257 states, 3256 states have (on average 3.5233415233415233) internal successors, (11472), 3256 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3257 states to 3257 states and 11472 transitions. [2021-05-03 16:50:59,710 INFO L78 Accepts]: Start accepts. Automaton has 3257 states and 11472 transitions. Word has length 28 [2021-05-03 16:50:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:59,710 INFO L480 AbstractCegarLoop]: Abstraction has 3257 states and 11472 transitions. [2021-05-03 16:50:59,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3257 states and 11472 transitions. [2021-05-03 16:50:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:50:59,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:59,715 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:59,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-05-03 16:50:59,915 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-05-03 16:50:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:59,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645387389] [2021-05-03 16:50:59,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:00,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645387389] [2021-05-03 16:51:00,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894774021] [2021-05-03 16:51:00,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:00,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:51:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:00,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:00,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:51:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544862338] [2021-05-03 16:51:00,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:51:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:51:00,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:51:00,585 INFO L87 Difference]: Start difference. First operand 3257 states and 11472 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:04,904 INFO L93 Difference]: Finished difference Result 6845 states and 21795 transitions. [2021-05-03 16:51:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 16:51:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:04,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:04,923 INFO L225 Difference]: With dead ends: 6845 [2021-05-03 16:51:04,923 INFO L226 Difference]: Without dead ends: 6845 [2021-05-03 16:51:04,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 2301.4ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 16:51:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6845 states. [2021-05-03 16:51:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6845 to 3351. [2021-05-03 16:51:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 3350 states have (on average 3.514925373134328) internal successors, (11775), 3350 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 11775 transitions. [2021-05-03 16:51:05,011 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 11775 transitions. Word has length 28 [2021-05-03 16:51:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:05,011 INFO L480 AbstractCegarLoop]: Abstraction has 3351 states and 11775 transitions. [2021-05-03 16:51:05,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 11775 transitions. [2021-05-03 16:51:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:05,016 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:05,016 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, 1, 1] [2021-05-03 16:51:05,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4099 [2021-05-03 16:51:05,217 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:05,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-05-03 16:51:05,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:05,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791826958] [2021-05-03 16:51:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:05,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791826958] [2021-05-03 16:51:05,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489790965] [2021-05-03 16:51:05,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:05,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:51:05,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:05,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:51:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:05,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:05,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:51:05,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926778440] [2021-05-03 16:51:05,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:51:05,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:51:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:51:05,953 INFO L87 Difference]: Start difference. First operand 3351 states and 11775 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:09,326 INFO L93 Difference]: Finished difference Result 7073 states and 22533 transitions. [2021-05-03 16:51:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:51:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:09,349 INFO L225 Difference]: With dead ends: 7073 [2021-05-03 16:51:09,350 INFO L226 Difference]: Without dead ends: 7037 [2021-05-03 16:51:09,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1991.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:51:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7037 states. [2021-05-03 16:51:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7037 to 3742. [2021-05-03 16:51:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3742 states, 3741 states have (on average 3.5356856455493184) internal successors, (13227), 3741 states have internal predecessors, (13227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3742 states to 3742 states and 13227 transitions. [2021-05-03 16:51:09,473 INFO L78 Accepts]: Start accepts. Automaton has 3742 states and 13227 transitions. Word has length 28 [2021-05-03 16:51:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:09,473 INFO L480 AbstractCegarLoop]: Abstraction has 3742 states and 13227 transitions. [2021-05-03 16:51:09,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3742 states and 13227 transitions. [2021-05-03 16:51:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:09,480 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:09,480 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, 1, 1] [2021-05-03 16:51:09,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4100 [2021-05-03 16:51:09,699 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:09,699 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-05-03 16:51:09,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:09,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081632777] [2021-05-03 16:51:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081632777] [2021-05-03 16:51:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013636904] [2021-05-03 16:51:09,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:09,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:51:09,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:09,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:51:09,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:10,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:10,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:51:10,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637936122] [2021-05-03 16:51:10,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:51:10,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:51:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:51:10,402 INFO L87 Difference]: Start difference. First operand 3742 states and 13227 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:13,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:13,507 INFO L93 Difference]: Finished difference Result 7243 states and 22972 transitions. [2021-05-03 16:51:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:51:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:13,526 INFO L225 Difference]: With dead ends: 7243 [2021-05-03 16:51:13,526 INFO L226 Difference]: Without dead ends: 7243 [2021-05-03 16:51:13,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 2011.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:51:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7243 states. [2021-05-03 16:51:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7243 to 3456. [2021-05-03 16:51:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 3455 states have (on average 3.499276410998553) internal successors, (12090), 3455 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 12090 transitions. [2021-05-03 16:51:13,613 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 12090 transitions. Word has length 28 [2021-05-03 16:51:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:13,613 INFO L480 AbstractCegarLoop]: Abstraction has 3456 states and 12090 transitions. [2021-05-03 16:51:13,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 12090 transitions. [2021-05-03 16:51:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:13,618 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:13,618 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:13,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4101 [2021-05-03 16:51:13,819 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-05-03 16:51:13,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:13,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892454958] [2021-05-03 16:51:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:13,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892454958] [2021-05-03 16:51:13,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654248939] [2021-05-03 16:51:13,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:14,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:51:14,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:14,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:14,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:14,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 16:51:14,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174615908] [2021-05-03 16:51:14,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:51:14,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:51:14,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:51:14,439 INFO L87 Difference]: Start difference. First operand 3456 states and 12090 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:18,326 INFO L93 Difference]: Finished difference Result 6314 states and 20447 transitions. [2021-05-03 16:51:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 16:51:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:18,345 INFO L225 Difference]: With dead ends: 6314 [2021-05-03 16:51:18,345 INFO L226 Difference]: Without dead ends: 6310 [2021-05-03 16:51:18,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2125.0ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:51:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6310 states. [2021-05-03 16:51:18,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6310 to 3216. [2021-05-03 16:51:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5216174183514775) internal successors, (11322), 3215 states have internal predecessors, (11322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11322 transitions. [2021-05-03 16:51:18,440 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11322 transitions. Word has length 28 [2021-05-03 16:51:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:18,440 INFO L480 AbstractCegarLoop]: Abstraction has 3216 states and 11322 transitions. [2021-05-03 16:51:18,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11322 transitions. [2021-05-03 16:51:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:18,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:18,445 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:18,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:18,646 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:18,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-05-03 16:51:18,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:18,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702453999] [2021-05-03 16:51:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:18,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702453999] [2021-05-03 16:51:18,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208397774] [2021-05-03 16:51:18,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:18,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:18,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:19,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:19,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 16:51:19,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748278716] [2021-05-03 16:51:19,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:51:19,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:51:19,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:51:19,439 INFO L87 Difference]: Start difference. First operand 3216 states and 11322 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:24,792 INFO L93 Difference]: Finished difference Result 9622 states and 31428 transitions. [2021-05-03 16:51:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 16:51:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:24,820 INFO L225 Difference]: With dead ends: 9622 [2021-05-03 16:51:24,820 INFO L226 Difference]: Without dead ends: 9622 [2021-05-03 16:51:24,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3157.8ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:51:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2021-05-03 16:51:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 3400. [2021-05-03 16:51:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3399 states have (on average 3.5884083553986468) internal successors, (12197), 3399 states have internal predecessors, (12197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 12197 transitions. [2021-05-03 16:51:24,918 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 12197 transitions. Word has length 28 [2021-05-03 16:51:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:24,919 INFO L480 AbstractCegarLoop]: Abstraction has 3400 states and 12197 transitions. [2021-05-03 16:51:24,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:24,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 12197 transitions. [2021-05-03 16:51:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:24,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:24,923 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:25,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4103,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:25,124 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-05-03 16:51:25,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:25,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896360088] [2021-05-03 16:51:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:25,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896360088] [2021-05-03 16:51:25,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025817330] [2021-05-03 16:51:25,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:25,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:51:25,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:25,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:25,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:25,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:25,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 16:51:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545562129] [2021-05-03 16:51:25,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:51:25,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:51:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:51:25,987 INFO L87 Difference]: Start difference. First operand 3400 states and 12197 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:31,940 INFO L93 Difference]: Finished difference Result 9451 states and 30963 transitions. [2021-05-03 16:51:31,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 16:51:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:31,964 INFO L225 Difference]: With dead ends: 9451 [2021-05-03 16:51:31,965 INFO L226 Difference]: Without dead ends: 9451 [2021-05-03 16:51:31,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 3381.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 16:51:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-05-03 16:51:32,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 3366. [2021-05-03 16:51:32,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 3.572065378900446) internal successors, (12020), 3365 states have internal predecessors, (12020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 12020 transitions. [2021-05-03 16:51:32,066 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 12020 transitions. Word has length 28 [2021-05-03 16:51:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:32,066 INFO L480 AbstractCegarLoop]: Abstraction has 3366 states and 12020 transitions. [2021-05-03 16:51:32,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 12020 transitions. [2021-05-03 16:51:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:32,070 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:32,071 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:32,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4104 [2021-05-03 16:51:32,271 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-05-03 16:51:32,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:32,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298470587] [2021-05-03 16:51:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:32,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298470587] [2021-05-03 16:51:32,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067107236] [2021-05-03 16:51:32,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:32,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:51:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:33,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:33,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 16:51:33,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329956497] [2021-05-03 16:51:33,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:51:33,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:33,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:51:33,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:51:33,112 INFO L87 Difference]: Start difference. First operand 3366 states and 12020 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:38,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:38,514 INFO L93 Difference]: Finished difference Result 8882 states and 28183 transitions. [2021-05-03 16:51:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-03 16:51:38,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:38,537 INFO L225 Difference]: With dead ends: 8882 [2021-05-03 16:51:38,537 INFO L226 Difference]: Without dead ends: 8882 [2021-05-03 16:51:38,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 2992.6ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 16:51:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8882 states. [2021-05-03 16:51:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8882 to 3386. [2021-05-03 16:51:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 3.5745937961595273) internal successors, (12100), 3385 states have internal predecessors, (12100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 12100 transitions. [2021-05-03 16:51:38,641 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 12100 transitions. Word has length 28 [2021-05-03 16:51:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:38,641 INFO L480 AbstractCegarLoop]: Abstraction has 3386 states and 12100 transitions. [2021-05-03 16:51:38,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 12100 transitions. [2021-05-03 16:51:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:38,645 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:38,645 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:38,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:38,846 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-05-03 16:51:38,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:38,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566029072] [2021-05-03 16:51:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:39,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566029072] [2021-05-03 16:51:39,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595342349] [2021-05-03 16:51:39,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:39,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:51:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:39,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:39,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:39,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:39,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 16:51:39,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513342116] [2021-05-03 16:51:39,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:51:39,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:39,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:51:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:51:39,572 INFO L87 Difference]: Start difference. First operand 3386 states and 12100 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:44,201 INFO L93 Difference]: Finished difference Result 8384 states and 26980 transitions. [2021-05-03 16:51:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-03 16:51:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:44,221 INFO L225 Difference]: With dead ends: 8384 [2021-05-03 16:51:44,221 INFO L226 Difference]: Without dead ends: 8376 [2021-05-03 16:51:44,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2561.8ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:51:44,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-05-03 16:51:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 3368. [2021-05-03 16:51:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 3.570834570834571) internal successors, (12023), 3367 states have internal predecessors, (12023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:44,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 12023 transitions. [2021-05-03 16:51:44,313 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 12023 transitions. Word has length 28 [2021-05-03 16:51:44,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:44,314 INFO L480 AbstractCegarLoop]: Abstraction has 3368 states and 12023 transitions. [2021-05-03 16:51:44,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 12023 transitions. [2021-05-03 16:51:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:44,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:44,319 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:44,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4106,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:44,520 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-05-03 16:51:44,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:44,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708639655] [2021-05-03 16:51:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:44,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708639655] [2021-05-03 16:51:44,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118471256] [2021-05-03 16:51:44,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:44,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:51:44,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:44,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:45,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:45,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 16:51:45,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593346163] [2021-05-03 16:51:45,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:51:45,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:45,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:51:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:51:45,470 INFO L87 Difference]: Start difference. First operand 3368 states and 12023 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:51,250 INFO L93 Difference]: Finished difference Result 8303 states and 26734 transitions. [2021-05-03 16:51:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 16:51:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:51,276 INFO L225 Difference]: With dead ends: 8303 [2021-05-03 16:51:51,277 INFO L226 Difference]: Without dead ends: 8303 [2021-05-03 16:51:51,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 3128.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:51:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8303 states. [2021-05-03 16:51:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8303 to 3384. [2021-05-03 16:51:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 3383 states have (on average 3.5728643216080402) internal successors, (12087), 3383 states have internal predecessors, (12087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 12087 transitions. [2021-05-03 16:51:51,374 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 12087 transitions. Word has length 28 [2021-05-03 16:51:51,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:51,374 INFO L480 AbstractCegarLoop]: Abstraction has 3384 states and 12087 transitions. [2021-05-03 16:51:51,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:51,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 12087 transitions. [2021-05-03 16:51:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:51,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:51,380 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:51,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4107 [2021-05-03 16:51:51,580 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-05-03 16:51:51,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:51,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564364952] [2021-05-03 16:51:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564364952] [2021-05-03 16:51:51,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485362280] [2021-05-03 16:51:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:51,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 16:51:51,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:51:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:52,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:52,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 16:51:52,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966801319] [2021-05-03 16:51:52,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:51:52,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:52,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:51:52,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:51:52,433 INFO L87 Difference]: Start difference. First operand 3384 states and 12087 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:51:58,237 INFO L93 Difference]: Finished difference Result 7971 states and 25950 transitions. [2021-05-03 16:51:58,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-03 16:51:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:51:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:51:58,260 INFO L225 Difference]: With dead ends: 7971 [2021-05-03 16:51:58,260 INFO L226 Difference]: Without dead ends: 7963 [2021-05-03 16:51:58,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 3109.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 16:51:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7963 states. [2021-05-03 16:51:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7963 to 3141. [2021-05-03 16:51:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 3.498407643312102) internal successors, (10985), 3140 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 10985 transitions. [2021-05-03 16:51:58,376 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 10985 transitions. Word has length 28 [2021-05-03 16:51:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:51:58,376 INFO L480 AbstractCegarLoop]: Abstraction has 3141 states and 10985 transitions. [2021-05-03 16:51:58,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:51:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 10985 transitions. [2021-05-03 16:51:58,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:51:58,383 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:51:58,383 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:51:58,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:58,584 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:51:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:51:58,584 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-05-03 16:51:58,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:51:58,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124289393] [2021-05-03 16:51:58,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:51:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:58,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124289393] [2021-05-03 16:51:58,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430397515] [2021-05-03 16:51:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:51:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:51:58,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:51:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:51:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:51:59,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:51:59,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-05-03 16:51:59,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156004647] [2021-05-03 16:51:59,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:51:59,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:51:59,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:51:59,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:51:59,470 INFO L87 Difference]: Start difference. First operand 3141 states and 10985 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:04,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:52:04,269 INFO L93 Difference]: Finished difference Result 6152 states and 19789 transitions. [2021-05-03 16:52:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 16:52:04,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 16:52:04,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:52:04,288 INFO L225 Difference]: With dead ends: 6152 [2021-05-03 16:52:04,288 INFO L226 Difference]: Without dead ends: 6152 [2021-05-03 16:52:04,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2777.5ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 16:52:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2021-05-03 16:52:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 3153. [2021-05-03 16:52:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 3.4971446700507616) internal successors, (11023), 3152 states have internal predecessors, (11023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 11023 transitions. [2021-05-03 16:52:04,362 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 11023 transitions. Word has length 28 [2021-05-03 16:52:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:52:04,362 INFO L480 AbstractCegarLoop]: Abstraction has 3153 states and 11023 transitions. [2021-05-03 16:52:04,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:52:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 11023 transitions. [2021-05-03 16:52:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 16:52:04,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:52:04,367 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:52:04,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4109 [2021-05-03 16:52:04,568 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:52:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:52:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-05-03 16:52:04,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:52:04,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281907902] [2021-05-03 16:52:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:52:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:52:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281907902] [2021-05-03 16:52:04,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036240623] [2021-05-03 16:52:04,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:52:04,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:52:04,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:52:04,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:52:04,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:52:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:52:05,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:52:05,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-05-03 16:52:05,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910229451] [2021-05-03 16:52:05,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:52:05,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:52:05,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:52:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:52:05,633 INFO L87 Difference]: Start difference. First operand 3153 states and 11023 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) Received shutdown request... [2021-05-03 16:52:06,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:52:06,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-05-03 16:52:06,367 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 16:52:06,373 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 16:52:06,374 INFO L202 PluginConnector]: Adding new model max-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:52:06 BasicIcfg [2021-05-03 16:52:06,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:52:06,374 INFO L168 Benchmark]: Toolchain (without parser) took 827682.70 ms. Allocated memory was 352.3 MB in the beginning and 545.3 MB in the end (delta: 192.9 MB). Free memory was 331.4 MB in the beginning and 445.5 MB in the end (delta: -114.1 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.0 GB. [2021-05-03 16:52:06,374 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 352.3 MB. Free memory is still 332.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:52:06,374 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.01 ms. Allocated memory is still 352.3 MB. Free memory was 331.3 MB in the beginning and 329.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:52:06,375 INFO L168 Benchmark]: Boogie Preprocessor took 10.83 ms. Allocated memory is still 352.3 MB. Free memory was 329.9 MB in the beginning and 328.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 16:52:06,375 INFO L168 Benchmark]: RCFGBuilder took 250.23 ms. Allocated memory is still 352.3 MB. Free memory was 328.9 MB in the beginning and 316.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:52:06,375 INFO L168 Benchmark]: TraceAbstraction took 827375.38 ms. Allocated memory was 352.3 MB in the beginning and 545.3 MB in the end (delta: 192.9 MB). Free memory was 315.8 MB in the beginning and 445.5 MB in the end (delta: -129.7 MB). Peak memory consumption was 65.7 MB. Max. memory is 16.0 GB. [2021-05-03 16:52:06,375 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 0.11 ms. Allocated memory is still 352.3 MB. Free memory is still 332.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.01 ms. Allocated memory is still 352.3 MB. Free memory was 331.3 MB in the beginning and 329.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.83 ms. Allocated memory is still 352.3 MB. Free memory was 329.9 MB in the beginning and 328.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 250.23 ms. Allocated memory is still 352.3 MB. Free memory was 328.9 MB in the beginning and 316.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 827375.38 ms. Allocated memory was 352.3 MB in the beginning and 545.3 MB in the end (delta: 192.9 MB). Free memory was 315.8 MB in the beginning and 445.5 MB in the end (delta: -129.7 MB). Peak memory consumption was 65.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 65). Cancelled while BasicCegarLoop was constructing difference of abstraction (3153states) and FLOYD_HOARE automaton (currently 9 states, 16 states before enhancement),while ReachableStatesComputation was computing reachable states (41 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 827267.6ms, OverallIterations: 141, TraceHistogramMax: 3, EmptinessCheckTime: 382.8ms, AutomataDifference: 484354.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6281 SDtfs, 32394 SDslu, 46575 SDs, 0 SdLazy, 82429 SolverSat, 5702 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 70810.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8096 GetRequests, 2686 SyntacticMatches, 139 SemanticMatches, 5271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73716 ImplicationChecksByTransitivity, 441899.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3742occurred in iteration=131, InterpolantAutomatonStates: 4285, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4797.2ms AutomataMinimizationTime, 140 MinimizatonAttempts, 172951 StatesRemovedByMinimization, 140 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 422.6ms SsaConstructionTime, 1435.8ms SatisfiabilityAnalysisTime, 305214.7ms InterpolantComputationTime, 7162 NumberOfCodeBlocks, 7162 NumberOfCodeBlocksAsserted, 459 NumberOfCheckSat, 6883 ConstructedInterpolants, 123 QuantifiedInterpolants, 140024 SizeOfPredicates, 635 NumberOfNonLiveVariables, 9018 ConjunctsInSsa, 2415 ConjunctsInUnsatCore, 279 InterpolantComputations, 3 PerfectInterpolantSequences, 250/1870 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