/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/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:41:48,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:41:48,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:41:48,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 04:41:48,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 04:41:48,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 04:41:48,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 04:41:48,360 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 [2021-04-15 04:41:48,389 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:41:48,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:41:48,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:41:48,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:41:48,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:41:48,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:41:48,393 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:41:48,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:41:48,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:41:48,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:41:48,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:41:48,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:41:48,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:41:48,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:41:48,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:41:48,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:41:48,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:41:48,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:41:48,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:41:48,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:41:48,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:41:48,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:41:48,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:41:48,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:41:48,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:41:48,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:41:48,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:41:48,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:41:48,659 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:41:48,660 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:41:48,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-04-15 04:41:48,661 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-04-15 04:41:48,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:41:48,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:41:48,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:41:48,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:41:48,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:41:48,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:41:48,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:41:48,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:41:48,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:41:48,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/1) ... [2021-04-15 04:41:48,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:41:48,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:41:48,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:41:48,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:41:48,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (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 [2021-04-15 04:41:48,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:41:48,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:41:48,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:41:48,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:41:48,785 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:41:48,785 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:41:48,785 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:41:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:41:48,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:41:48,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 04:41:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 04:41:48,786 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 04:41:48,786 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 04:41:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 04:41:48,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 04:41:48,788 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:41:49,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:41:49,018 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:41:49,019 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:41:49 BoogieIcfgContainer [2021-04-15 04:41:49,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:41:49,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:41:49,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:41:49,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:41:49,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:41:48" (1/2) ... [2021-04-15 04:41:49,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44eb4bf2 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:41:49, skipping insertion in model container [2021-04-15 04:41:49,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:41:49" (2/2) ... [2021-04-15 04:41:49,023 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-04-15 04:41:49,027 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:41:49,027 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:41:49,029 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:41:49,029 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:41:49,078 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 04:41:49,106 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 04:41:49,129 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:41:49,129 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:41:49,129 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:41:49,129 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:41:49,129 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:41:49,129 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:41:49,129 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:41:49,129 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:41:49,142 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-04-15 04:41:49,190 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:41:49,211 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:49,212 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:41:49,212 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-04-15 04:41:49,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:49,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11282417] [2021-04-15 04:41:49,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:49,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11282417] [2021-04-15 04:41:49,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:41:49,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 04:41:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29550998] [2021-04-15 04:41:49,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:41:49,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:41:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:41:49,389 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:49,436 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-04-15 04:41:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:41:49,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 04:41:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:49,463 INFO L225 Difference]: With dead ends: 1236 [2021-04-15 04:41:49,463 INFO L226 Difference]: Without dead ends: 1109 [2021-04-15 04:41:49,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:41:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-04-15 04:41:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-04-15 04:41:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-04-15 04:41:49,540 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-04-15 04:41:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:49,541 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-04-15 04:41:49,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,542 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-04-15 04:41:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:41:49,546 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:49,546 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] [2021-04-15 04:41:49,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:41:49,547 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:49,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-04-15 04:41:49,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:49,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462910325] [2021-04-15 04:41:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:49,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462910325] [2021-04-15 04:41:49,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:41:49,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:41:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549432932] [2021-04-15 04:41:49,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:49,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:49,623 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:49,668 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-04-15 04:41:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:41:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 04:41:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:49,676 INFO L225 Difference]: With dead ends: 1524 [2021-04-15 04:41:49,676 INFO L226 Difference]: Without dead ends: 1418 [2021-04-15 04:41:49,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-04-15 04:41:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-04-15 04:41:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-04-15 04:41:49,711 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-04-15 04:41:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:49,711 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-04-15 04:41:49,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-04-15 04:41:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:41:49,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:49,714 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] [2021-04-15 04:41:49,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 04:41:49,714 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-04-15 04:41:49,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:49,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106793731] [2021-04-15 04:41:49,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:49,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106793731] [2021-04-15 04:41:49,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:41:49,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:41:49,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278591077] [2021-04-15 04:41:49,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:49,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:49,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:49,754 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:49,805 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-04-15 04:41:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:41:49,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 04:41:49,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:49,815 INFO L225 Difference]: With dead ends: 2017 [2021-04-15 04:41:49,815 INFO L226 Difference]: Without dead ends: 1875 [2021-04-15 04:41:49,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-04-15 04:41:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-04-15 04:41:49,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-04-15 04:41:49,876 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-04-15 04:41:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:49,879 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-04-15 04:41:49,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-04-15 04:41:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:41:49,884 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:49,884 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] [2021-04-15 04:41:49,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 04:41:49,885 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-04-15 04:41:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:49,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342128870] [2021-04-15 04:41:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:49,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342128870] [2021-04-15 04:41:49,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678712655] [2021-04-15 04:41:49,925 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 [2021-04-15 04:41:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:41:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:50,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:50,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-04-15 04:41:50,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220531340] [2021-04-15 04:41:50,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:41:50,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:41:50,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:41:50,102 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-04-15 04:41:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:50,248 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-04-15 04:41:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:41:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 [2021-04-15 04:41:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:50,259 INFO L225 Difference]: With dead ends: 2308 [2021-04-15 04:41:50,259 INFO L226 Difference]: Without dead ends: 2108 [2021-04-15 04:41:50,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:41:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-04-15 04:41:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-04-15 04:41:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-04-15 04:41:50,301 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-04-15 04:41:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:50,301 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-04-15 04:41:50,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-04-15 04:41:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-04-15 04:41:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:41:50,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:50,304 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] [2021-04-15 04:41:50,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:50,520 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1080968406, now seen corresponding path program 1 times [2021-04-15 04:41:50,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:50,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206313499] [2021-04-15 04:41:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:50,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:50,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206313499] [2021-04-15 04:41:50,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:41:50,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:41:50,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300127438] [2021-04-15 04:41:50,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:50,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:50,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:50,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:50,544 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:50,601 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-04-15 04:41:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:41:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 04:41:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:50,610 INFO L225 Difference]: With dead ends: 1950 [2021-04-15 04:41:50,610 INFO L226 Difference]: Without dead ends: 1860 [2021-04-15 04:41:50,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-04-15 04:41:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-04-15 04:41:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-04-15 04:41:50,647 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-04-15 04:41:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:50,648 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-04-15 04:41:50,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-04-15 04:41:50,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:41:50,651 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:50,651 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] [2021-04-15 04:41:50,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 04:41:50,651 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1489193046, now seen corresponding path program 2 times [2021-04-15 04:41:50,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:50,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799761930] [2021-04-15 04:41:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:50,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799761930] [2021-04-15 04:41:50,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:41:50,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:41:50,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286712412] [2021-04-15 04:41:50,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:50,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:50,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:50,669 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:50,716 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-04-15 04:41:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:41:50,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 04:41:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:50,721 INFO L225 Difference]: With dead ends: 1308 [2021-04-15 04:41:50,721 INFO L226 Difference]: Without dead ends: 1308 [2021-04-15 04:41:50,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-04-15 04:41:50,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-04-15 04:41:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-04-15 04:41:50,748 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-04-15 04:41:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:50,750 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-04-15 04:41:50,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-04-15 04:41:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:41:50,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:50,754 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] [2021-04-15 04:41:50,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 04:41:50,755 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:50,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:50,755 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-04-15 04:41:50,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:50,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859330810] [2021-04-15 04:41:50,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:50,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859330810] [2021-04-15 04:41:50,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:41:50,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:41:50,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389202973] [2021-04-15 04:41:50,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:50,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:50,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:41:50,792 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:50,831 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-04-15 04:41:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:41:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 04:41:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:50,836 INFO L225 Difference]: With dead ends: 1142 [2021-04-15 04:41:50,836 INFO L226 Difference]: Without dead ends: 1120 [2021-04-15 04:41:50,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-04-15 04:41:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-04-15 04:41:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-04-15 04:41:50,859 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-04-15 04:41:50,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:50,859 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-04-15 04:41:50,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:50,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-04-15 04:41:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 04:41:50,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:50,862 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, 1, 1, 1] [2021-04-15 04:41:50,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 04:41:50,862 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:50,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1861969590, now seen corresponding path program 1 times [2021-04-15 04:41:50,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:50,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455541079] [2021-04-15 04:41:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:50,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:41:50,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455541079] [2021-04-15 04:41:50,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081666031] [2021-04-15 04:41:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 04:41:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:50,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 04:41:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:41:51,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 04:41:51,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-04-15 04:41:51,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082357811] [2021-04-15 04:41:51,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:51,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:51,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:51,054 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:51,072 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-04-15 04:41:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:41:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-04-15 04:41:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:51,080 INFO L225 Difference]: With dead ends: 1344 [2021-04-15 04:41:51,080 INFO L226 Difference]: Without dead ends: 1344 [2021-04-15 04:41:51,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:51,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-04-15 04:41:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-04-15 04:41:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-04-15 04:41:51,105 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-04-15 04:41:51,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:51,106 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-04-15 04:41:51,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:51,106 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-04-15 04:41:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 04:41:51,109 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:51,109 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, 1, 1, 1] [2021-04-15 04:41:51,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:51,327 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:51,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1282023498, now seen corresponding path program 1 times [2021-04-15 04:41:51,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:51,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312886848] [2021-04-15 04:41:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:51,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312886848] [2021-04-15 04:41:51,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781595858] [2021-04-15 04:41:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:51,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 04:41:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:51,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 04:41:51,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-04-15 04:41:51,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150899599] [2021-04-15 04:41:51,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:41:51,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:41:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:51,434 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:51,451 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-04-15 04:41:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:41:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-04-15 04:41:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:51,468 INFO L225 Difference]: With dead ends: 1608 [2021-04-15 04:41:51,468 INFO L226 Difference]: Without dead ends: 1608 [2021-04-15 04:41:51,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:41:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-04-15 04:41:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-04-15 04:41:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-04-15 04:41:51,492 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-04-15 04:41:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:51,492 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-04-15 04:41:51,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-04-15 04:41:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:41:51,494 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:51,494 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:51,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:51,712 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 1 times [2021-04-15 04:41:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333756362] [2021-04-15 04:41:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333756362] [2021-04-15 04:41:51,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828406916] [2021-04-15 04:41:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 04:41:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:41:51,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:52,029 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 13 treesize of output 9 [2021-04-15 04:41:52,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:52,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-04-15 04:41:52,061 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 15 treesize of output 11 [2021-04-15 04:41:52,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:52,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-04-15 04:41:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:52,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:52,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:41:52,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156062211] [2021-04-15 04:41:52,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:41:52,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:52,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:41:52,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:41:52,119 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-04-15 04:41:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:52,300 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-04-15 04:41:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:41:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:41:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:52,307 INFO L225 Difference]: With dead ends: 2449 [2021-04-15 04:41:52,307 INFO L226 Difference]: Without dead ends: 2370 [2021-04-15 04:41:52,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:41:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-04-15 04:41:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-04-15 04:41:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.7068166776968896) internal successors, (5601), 1511 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-04-15 04:41:52,355 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-04-15 04:41:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:52,355 INFO L480 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-04-15 04:41:52,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-04-15 04:41:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-04-15 04:41:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:41:52,359 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:52,360 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:52,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:52,575 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash -53868170, now seen corresponding path program 2 times [2021-04-15 04:41:52,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:52,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310870490] [2021-04-15 04:41:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310870490] [2021-04-15 04:41:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731598739] [2021-04-15 04:41:52,707 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 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 [2021-04-15 04:41:52,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:41:52,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:52,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:41:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:52,805 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 17 treesize of output 13 [2021-04-15 04:41:52,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:52,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:41:52,831 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 15 treesize of output 11 [2021-04-15 04:41:52,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:52,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:52,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:41:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:52,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:52,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:41:52,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432640834] [2021-04-15 04:41:52,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:41:52,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:52,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:41:52,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:41:52,885 INFO L87 Difference]: Start difference. First operand 1512 states and 5601 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-04-15 04:41:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:53,056 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-04-15 04:41:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:41:53,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-04-15 04:41:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:53,064 INFO L225 Difference]: With dead ends: 2849 [2021-04-15 04:41:53,064 INFO L226 Difference]: Without dead ends: 2770 [2021-04-15 04:41:53,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:41:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-04-15 04:41:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-04-15 04:41:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.7239766081871344) internal successors, (6368), 1710 states have internal predecessors, (6368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-04-15 04:41:53,109 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-04-15 04:41:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:53,110 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-04-15 04:41:53,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-04-15 04:41:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-04-15 04:41:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:41:53,115 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:53,115 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:53,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-15 04:41:53,329 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1931624520, now seen corresponding path program 3 times [2021-04-15 04:41:53,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:53,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898970348] [2021-04-15 04:41:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:53,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898970348] [2021-04-15 04:41:53,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206410403] [2021-04-15 04:41:53,449 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 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 [2021-04-15 04:41:53,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:41:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:41:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:53,524 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 17 treesize of output 13 [2021-04-15 04:41:53,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:53,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:53,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:53,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:41:53,560 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 15 treesize of output 11 [2021-04-15 04:41:53,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:53,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:53,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:53,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:41:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:53,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:53,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:41:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686451123] [2021-04-15 04:41:53,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:41:53,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:53,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:41:53,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:41:53,588 INFO L87 Difference]: Start difference. First operand 1711 states and 6368 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-04-15 04:41:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:53,782 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-04-15 04:41:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:41:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:41:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:53,790 INFO L225 Difference]: With dead ends: 2677 [2021-04-15 04:41:53,790 INFO L226 Difference]: Without dead ends: 2598 [2021-04-15 04:41:53,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:41:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-04-15 04:41:53,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-04-15 04:41:53,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-04-15 04:41:53,834 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-04-15 04:41:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:53,834 INFO L480 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-04-15 04:41:53,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-04-15 04:41:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-04-15 04:41:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:41:53,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:53,840 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:54,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:54,056 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash 490207522, now seen corresponding path program 4 times [2021-04-15 04:41:54,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:54,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021928302] [2021-04-15 04:41:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:54,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021928302] [2021-04-15 04:41:54,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380304776] [2021-04-15 04:41:54,182 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 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 [2021-04-15 04:41:54,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:41:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:54,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:41:54,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:54,258 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 17 treesize of output 13 [2021-04-15 04:41:54,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:54,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:54,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:54,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:41:54,282 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 15 treesize of output 11 [2021-04-15 04:41:54,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:54,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:54,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:54,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:41:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:54,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:54,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:41:54,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919544905] [2021-04-15 04:41:54,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:41:54,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:54,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:41:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:41:54,325 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-04-15 04:41:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:54,542 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-04-15 04:41:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:41:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 29 [2021-04-15 04:41:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:54,550 INFO L225 Difference]: With dead ends: 3111 [2021-04-15 04:41:54,550 INFO L226 Difference]: Without dead ends: 3032 [2021-04-15 04:41:54,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:41:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-04-15 04:41:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-04-15 04:41:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-04-15 04:41:54,611 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-04-15 04:41:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:54,611 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-04-15 04:41:54,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-04-15 04:41:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-04-15 04:41:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:41:54,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:54,617 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:54,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:54,818 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:54,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash -464930448, now seen corresponding path program 5 times [2021-04-15 04:41:54,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:54,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130113852] [2021-04-15 04:41:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:54,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130113852] [2021-04-15 04:41:54,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750994638] [2021-04-15 04:41:54,969 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 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 [2021-04-15 04:41:54,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:41:54,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:41:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:55,041 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 17 treesize of output 13 [2021-04-15 04:41:55,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:55,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:41:55,086 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 15 treesize of output 11 [2021-04-15 04:41:55,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:55,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:41:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:55,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:55,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:41:55,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172784059] [2021-04-15 04:41:55,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:41:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:41:55,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:41:55,121 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-04-15 04:41:55,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:55,312 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-04-15 04:41:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:41:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:41:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:55,319 INFO L225 Difference]: With dead ends: 2933 [2021-04-15 04:41:55,319 INFO L226 Difference]: Without dead ends: 2854 [2021-04-15 04:41:55,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:41:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-04-15 04:41:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-04-15 04:41:55,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-04-15 04:41:55,359 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-04-15 04:41:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:55,359 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-04-15 04:41:55,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 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) [2021-04-15 04:41:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-04-15 04:41:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:41:55,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:55,363 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:55,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 04:41:55,577 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1689459718, now seen corresponding path program 6 times [2021-04-15 04:41:55,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:55,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516190948] [2021-04-15 04:41:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:55,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516190948] [2021-04-15 04:41:55,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983547457] [2021-04-15 04:41:55,691 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 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 [2021-04-15 04:41:55,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:41:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:41:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:55,801 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 15 treesize of output 11 [2021-04-15 04:41:55,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:55,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-04-15 04:41:55,831 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 15 treesize of output 11 [2021-04-15 04:41:55,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:41:55,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:41:55,835 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-04-15 04:41:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:41:55,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:55,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:41:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705597487] [2021-04-15 04:41:55,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:41:55,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:55,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:41:55,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:41:55,875 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-04-15 04:41:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:56,046 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-04-15 04:41:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:41:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:41:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:56,053 INFO L225 Difference]: With dead ends: 2807 [2021-04-15 04:41:56,053 INFO L226 Difference]: Without dead ends: 2728 [2021-04-15 04:41:56,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:41:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-04-15 04:41:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-04-15 04:41:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-04-15 04:41:56,115 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-04-15 04:41:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:56,115 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-04-15 04:41:56,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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) [2021-04-15 04:41:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-04-15 04:41:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 04:41:56,119 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:56,119 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:56,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 04:41:56,325 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438650, now seen corresponding path program 7 times [2021-04-15 04:41:56,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:56,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628642756] [2021-04-15 04:41:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:56,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628642756] [2021-04-15 04:41:56,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100929136] [2021-04-15 04:41:56,350 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 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 [2021-04-15 04:41:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:41:56,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:41:56,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:56,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-04-15 04:41:56,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363250318] [2021-04-15 04:41:56,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:41:56,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:41:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:41:56,418 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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) [2021-04-15 04:41:56,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:56,480 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-04-15 04:41:56,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:41:56,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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 31 [2021-04-15 04:41:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:56,487 INFO L225 Difference]: With dead ends: 3393 [2021-04-15 04:41:56,487 INFO L226 Difference]: Without dead ends: 3242 [2021-04-15 04:41:56,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:41:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-04-15 04:41:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-04-15 04:41:56,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-04-15 04:41:56,554 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-04-15 04:41:56,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:56,555 INFO L480 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-04-15 04:41:56,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 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) [2021-04-15 04:41:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-04-15 04:41:56,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 04:41:56,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:56,560 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, 1, 1, 1, 1, 1] [2021-04-15 04:41:56,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 04:41:56,777 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:56,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:56,777 INFO L82 PathProgramCache]: Analyzing trace with hash 415909830, now seen corresponding path program 8 times [2021-04-15 04:41:56,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:56,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884916106] [2021-04-15 04:41:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:41:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884916106] [2021-04-15 04:41:56,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202002670] [2021-04-15 04:41:56,804 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 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 [2021-04-15 04:41:56,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:41:56,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:56,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:41:56,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:41:56,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:56,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-04-15 04:41:56,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703008203] [2021-04-15 04:41:56,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:41:56,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:56,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:41:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:41:56,877 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:56,953 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-04-15 04:41:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:41:56,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 04:41:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:56,962 INFO L225 Difference]: With dead ends: 5257 [2021-04-15 04:41:56,962 INFO L226 Difference]: Without dead ends: 5006 [2021-04-15 04:41:56,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:41:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-04-15 04:41:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-04-15 04:41:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-04-15 04:41:57,041 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-04-15 04:41:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:57,041 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-04-15 04:41:57,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-04-15 04:41:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:41:57,049 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:57,049 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:41:57,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 04:41:57,264 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:57,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1135351718, now seen corresponding path program 9 times [2021-04-15 04:41:57,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:57,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501741488] [2021-04-15 04:41:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 04:41:57,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501741488] [2021-04-15 04:41:57,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278835310] [2021-04-15 04:41:57,341 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 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 [2021-04-15 04:41:57,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:41:57,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:41:57,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 04:41:57,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:57,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 04:41:57,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703668616] [2021-04-15 04:41:57,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:41:57,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:41:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:41:57,448 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:57,749 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-04-15 04:41:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:41:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:41:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:57,777 INFO L225 Difference]: With dead ends: 16323 [2021-04-15 04:41:57,777 INFO L226 Difference]: Without dead ends: 13965 [2021-04-15 04:41:57,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:41:57,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-04-15 04:41:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-04-15 04:41:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-04-15 04:41:57,963 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-04-15 04:41:57,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:57,964 INFO L480 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-04-15 04:41:57,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-04-15 04:41:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:41:57,979 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:57,979 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:41:58,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 04:41:58,185 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:58,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1002610221, now seen corresponding path program 10 times [2021-04-15 04:41:58,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:58,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615362408] [2021-04-15 04:41:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 04:41:58,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615362408] [2021-04-15 04:41:58,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259075205] [2021-04-15 04:41:58,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:41:58,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:41:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:41:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 04:41:58,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:58,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 04:41:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285058741] [2021-04-15 04:41:58,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:41:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:41:58,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:41:58,350 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-04-15 04:41:58,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:58,680 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-04-15 04:41:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:41:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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 34 [2021-04-15 04:41:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:58,724 INFO L225 Difference]: With dead ends: 18970 [2021-04-15 04:41:58,725 INFO L226 Difference]: Without dead ends: 18531 [2021-04-15 04:41:58,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:41:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-04-15 04:41:59,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-04-15 04:41:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-04-15 04:41:59,084 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-04-15 04:41:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:41:59,084 INFO L480 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-04-15 04:41:59,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 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) [2021-04-15 04:41:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-04-15 04:41:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:41:59,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:41:59,108 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:41:59,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:41:59,317 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:41:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:41:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 614978514, now seen corresponding path program 11 times [2021-04-15 04:41:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:41:59,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505192428] [2021-04-15 04:41:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:41:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:41:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:41:59,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505192428] [2021-04-15 04:41:59,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891409732] [2021-04-15 04:41:59,341 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 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 [2021-04-15 04:41:59,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:41:59,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:41:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:41:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:41:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:41:59,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:41:59,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:41:59,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394216791] [2021-04-15 04:41:59,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:41:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:41:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:41:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:41:59,480 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:41:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:41:59,729 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-04-15 04:41:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:41:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:41:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:41:59,771 INFO L225 Difference]: With dead ends: 18432 [2021-04-15 04:41:59,771 INFO L226 Difference]: Without dead ends: 18354 [2021-04-15 04:41:59,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:41:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-04-15 04:42:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-04-15 04:42:00,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:00,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-04-15 04:42:00,202 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-04-15 04:42:00,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:00,202 INFO L480 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-04-15 04:42:00,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-04-15 04:42:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:42:00,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:00,272 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:00,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:00,473 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 307309967, now seen corresponding path program 12 times [2021-04-15 04:42:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:00,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570625777] [2021-04-15 04:42:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 04:42:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570625777] [2021-04-15 04:42:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512872288] [2021-04-15 04:42:00,506 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 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 [2021-04-15 04:42:00,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:42:00,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:00,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:42:00,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 04:42:00,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:00,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:42:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231223026] [2021-04-15 04:42:00,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:42:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:42:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:42:00,632 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:00,957 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-04-15 04:42:00,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:42:00,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:42:00,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:01,007 INFO L225 Difference]: With dead ends: 20371 [2021-04-15 04:42:01,007 INFO L226 Difference]: Without dead ends: 18706 [2021-04-15 04:42:01,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:42:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-04-15 04:42:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-04-15 04:42:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-04-15 04:42:01,370 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-04-15 04:42:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:01,370 INFO L480 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-04-15 04:42:01,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-04-15 04:42:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:42:01,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:01,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:01,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 04:42:01,599 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:01,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:01,600 INFO L82 PathProgramCache]: Analyzing trace with hash -749871114, now seen corresponding path program 13 times [2021-04-15 04:42:01,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:01,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382879592] [2021-04-15 04:42:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 04:42:01,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382879592] [2021-04-15 04:42:01,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803779493] [2021-04-15 04:42:01,630 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:01,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:42:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:42:01,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:01,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:42:01,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992461401] [2021-04-15 04:42:01,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:42:01,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:01,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:42:01,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:42:01,746 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:02,215 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-04-15 04:42:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:42:02,216 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:42:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:02,297 INFO L225 Difference]: With dead ends: 29290 [2021-04-15 04:42:02,297 INFO L226 Difference]: Without dead ends: 27668 [2021-04-15 04:42:02,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:42:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-04-15 04:42:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-04-15 04:42:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-04-15 04:42:02,804 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-04-15 04:42:02,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:02,804 INFO L480 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-04-15 04:42:02,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:02,805 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-04-15 04:42:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:42:02,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:02,840 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:03,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:03,041 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:03,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1681290952, now seen corresponding path program 14 times [2021-04-15 04:42:03,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:03,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614881048] [2021-04-15 04:42:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 04:42:03,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614881048] [2021-04-15 04:42:03,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790305966] [2021-04-15 04:42:03,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:03,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:42:03,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:42:03,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:42:03,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:03,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:42:03,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908376922] [2021-04-15 04:42:03,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:42:03,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:42:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:42:03,299 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:03,661 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-04-15 04:42:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:42:03,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:42:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:03,736 INFO L225 Difference]: With dead ends: 27112 [2021-04-15 04:42:03,736 INFO L226 Difference]: Without dead ends: 26976 [2021-04-15 04:42:03,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:42:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-04-15 04:42:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-04-15 04:42:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-04-15 04:42:04,254 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-04-15 04:42:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:04,254 INFO L480 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-04-15 04:42:04,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-04-15 04:42:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:42:04,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:04,292 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:04,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 04:42:04,496 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:04,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1329276436, now seen corresponding path program 15 times [2021-04-15 04:42:04,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:04,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521159552] [2021-04-15 04:42:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:42:04,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521159552] [2021-04-15 04:42:04,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941484232] [2021-04-15 04:42:04,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:04,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:42:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:04,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:42:04,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 04:42:04,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:04,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 04:42:04,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402354949] [2021-04-15 04:42:04,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:42:04,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:04,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:42:04,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:42:04,625 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:05,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:05,082 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-04-15 04:42:05,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:42:05,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 04:42:05,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:05,166 INFO L225 Difference]: With dead ends: 30228 [2021-04-15 04:42:05,166 INFO L226 Difference]: Without dead ends: 30070 [2021-04-15 04:42:05,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:42:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-04-15 04:42:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-04-15 04:42:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-04-15 04:42:05,786 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-04-15 04:42:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:05,786 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-04-15 04:42:05,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-04-15 04:42:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:42:05,829 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:05,830 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:06,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 04:42:06,031 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash 190972073, now seen corresponding path program 16 times [2021-04-15 04:42:06,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:06,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902135714] [2021-04-15 04:42:06,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 04:42:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902135714] [2021-04-15 04:42:06,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123299021] [2021-04-15 04:42:06,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:06,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:42:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:42:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:06,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 04:42:06,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:06,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:42:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119492114] [2021-04-15 04:42:06,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:42:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:42:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:42:06,325 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-04-15 04:42:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:06,639 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-04-15 04:42:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:42:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 34 [2021-04-15 04:42:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:06,717 INFO L225 Difference]: With dead ends: 28338 [2021-04-15 04:42:06,717 INFO L226 Difference]: Without dead ends: 28230 [2021-04-15 04:42:06,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:42:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-04-15 04:42:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-04-15 04:42:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-04-15 04:42:07,373 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-04-15 04:42:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:07,373 INFO L480 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-04-15 04:42:07,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-04-15 04:42:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-04-15 04:42:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 04:42:07,422 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:07,422 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:07,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 04:42:07,623 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:07,623 INFO L82 PathProgramCache]: Analyzing trace with hash 832677239, now seen corresponding path program 17 times [2021-04-15 04:42:07,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:07,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839245907] [2021-04-15 04:42:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 04:42:07,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839245907] [2021-04-15 04:42:07,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036869123] [2021-04-15 04:42:07,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:07,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:42:07,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:42:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 04:42:07,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:07,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 04:42:07,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209826807] [2021-04-15 04:42:07,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:42:07,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:07,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:42:07,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:42:07,753 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-04-15 04:42:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:08,055 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-04-15 04:42:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:42:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 37 [2021-04-15 04:42:08,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:08,148 INFO L225 Difference]: With dead ends: 29898 [2021-04-15 04:42:08,149 INFO L226 Difference]: Without dead ends: 29898 [2021-04-15 04:42:08,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:42:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-04-15 04:42:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-04-15 04:42:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-04-15 04:42:08,842 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-04-15 04:42:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:08,842 INFO L480 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-04-15 04:42:08,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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) [2021-04-15 04:42:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-04-15 04:42:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 04:42:08,889 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:08,890 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:09,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 04:42:09,090 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash -97394957, now seen corresponding path program 18 times [2021-04-15 04:42:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:09,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516641787] [2021-04-15 04:42:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 04:42:09,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516641787] [2021-04-15 04:42:09,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118663822] [2021-04-15 04:42:09,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:09,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:42:09,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:42:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 04:42:09,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:09,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 04:42:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575484522] [2021-04-15 04:42:09,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:42:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:09,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:42:09,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:42:09,195 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-04-15 04:42:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:09,389 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-04-15 04:42:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:42:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2021-04-15 04:42:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:09,502 INFO L225 Difference]: With dead ends: 37062 [2021-04-15 04:42:09,502 INFO L226 Difference]: Without dead ends: 37062 [2021-04-15 04:42:09,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:42:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-04-15 04:42:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-04-15 04:42:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-04-15 04:42:10,679 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-04-15 04:42:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:10,680 INFO L480 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-04-15 04:42:10,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-04-15 04:42:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-04-15 04:42:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:10,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:10,767 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:10,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 04:42:10,968 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 19 times [2021-04-15 04:42:10,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:10,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809324305] [2021-04-15 04:42:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:11,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809324305] [2021-04-15 04:42:11,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529132366] [2021-04-15 04:42:11,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:42:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:11,454 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:42:11,454 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 28 treesize of output 16 [2021-04-15 04:42:11,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:11,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:11,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:11,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:42:11,552 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 30 treesize of output 22 [2021-04-15 04:42:11,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:11,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:11,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:11,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-04-15 04:42:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:11,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:11,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:42:11,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563408539] [2021-04-15 04:42:11,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:42:11,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:42:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:42:11,612 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:12,600 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:42:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:13,184 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-04-15 04:42:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:42:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:13,421 INFO L225 Difference]: With dead ends: 68650 [2021-04-15 04:42:13,421 INFO L226 Difference]: Without dead ends: 68595 [2021-04-15 04:42:13,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:42:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-04-15 04:42:14,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-04-15 04:42:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35386 states, 35385 states have (on average 4.1413310724883425) internal successors, (146541), 35385 states have internal predecessors, (146541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-04-15 04:42:14,889 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-04-15 04:42:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:14,889 INFO L480 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-04-15 04:42:14,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-04-15 04:42:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:14,978 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:14,978 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:15,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:15,178 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 20 times [2021-04-15 04:42:15,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:15,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613356644] [2021-04-15 04:42:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613356644] [2021-04-15 04:42:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789215204] [2021-04-15 04:42:15,517 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 [2021-04-15 04:42:15,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:42:15,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:15,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:15,685 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:42:15,686 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 28 treesize of output 16 [2021-04-15 04:42:15,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:15,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:15,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:15,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:42:15,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:42:15,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:15,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:15,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:15,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:42:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:15,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:15,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:42:15,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722248957] [2021-04-15 04:42:15,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:42:15,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:15,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:42:15,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:42:15,851 INFO L87 Difference]: Start difference. First operand 35386 states and 146541 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:18,146 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-04-15 04:42:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:42:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:18,386 INFO L225 Difference]: With dead ends: 63622 [2021-04-15 04:42:18,386 INFO L226 Difference]: Without dead ends: 63406 [2021-04-15 04:42:18,387 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1170.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:42:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-04-15 04:42:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-04-15 04:42:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35493 states, 35492 states have (on average 4.143947931928322) internal successors, (147077), 35492 states have internal predecessors, (147077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-04-15 04:42:19,779 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-04-15 04:42:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:19,780 INFO L480 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-04-15 04:42:19,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-04-15 04:42:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:19,854 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:19,854 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:20,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 04:42:20,055 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:20,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 21 times [2021-04-15 04:42:20,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:20,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111394087] [2021-04-15 04:42:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111394087] [2021-04-15 04:42:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561995433] [2021-04-15 04:42:20,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:42:20,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:42:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:42:20,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:42:20,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-04-15 04:42:20,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:20,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:20,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:20,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:81 [2021-04-15 04:42:20,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:20,852 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-04-15 04:42:20,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:20,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:20,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:20,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-04-15 04:42:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:20,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:20,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:42:20,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022913004] [2021-04-15 04:42:20,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:42:20,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:20,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:42:20,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:42:20,996 INFO L87 Difference]: Start difference. First operand 35493 states and 147077 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:22,035 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 04:42:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:23,306 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-04-15 04:42:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:42:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:23,500 INFO L225 Difference]: With dead ends: 59288 [2021-04-15 04:42:23,500 INFO L226 Difference]: Without dead ends: 59124 [2021-04-15 04:42:23,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1580.0ms TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:42:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-04-15 04:42:24,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-04-15 04:42:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35683 states, 35682 states have (on average 4.1406031052071075) internal successors, (147745), 35682 states have internal predecessors, (147745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-04-15 04:42:24,680 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-04-15 04:42:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:24,680 INFO L480 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-04-15 04:42:24,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-04-15 04:42:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:24,758 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:24,758 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:24,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:24,959 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:24,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1267064945, now seen corresponding path program 22 times [2021-04-15 04:42:24,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:24,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812886124] [2021-04-15 04:42:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:25,332 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:42:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:25,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812886124] [2021-04-15 04:42:25,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196458467] [2021-04-15 04:42:25,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:25,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:42:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:25,806 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:42:25,806 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 28 treesize of output 16 [2021-04-15 04:42:25,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:25,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:25,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:25,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:42:25,940 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 35 treesize of output 27 [2021-04-15 04:42:25,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:25,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:25,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:25,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:42:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:25,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:25,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:42:25,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892639337] [2021-04-15 04:42:26,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:42:26,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:26,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:42:26,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:42:26,000 INFO L87 Difference]: Start difference. First operand 35683 states and 147745 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:28,113 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-04-15 04:42:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:42:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:28,370 INFO L225 Difference]: With dead ends: 76962 [2021-04-15 04:42:28,370 INFO L226 Difference]: Without dead ends: 76778 [2021-04-15 04:42:28,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1437.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:42:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-04-15 04:42:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-04-15 04:42:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35521 states, 35520 states have (on average 4.1433277027027025) internal successors, (147171), 35520 states have internal predecessors, (147171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-04-15 04:42:29,646 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-04-15 04:42:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:29,647 INFO L480 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-04-15 04:42:29,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-04-15 04:42:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:29,717 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:29,717 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:29,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 04:42:29,925 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 23 times [2021-04-15 04:42:29,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:29,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693979259] [2021-04-15 04:42:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693979259] [2021-04-15 04:42:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509408792] [2021-04-15 04:42:30,210 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 [2021-04-15 04:42:30,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:42:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:42:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:42:30,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:42:30,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:30,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 48 [2021-04-15 04:42:30,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:42:30,677 INFO L628 ElimStorePlain]: treesize reduction 22, result has 66.7 percent of original size [2021-04-15 04:42:30,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:30,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-04-15 04:42:30,775 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 30 treesize of output 22 [2021-04-15 04:42:30,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:30,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:30,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:30,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:42:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:42:30,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-04-15 04:42:30,880 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:42:30,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:30,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:30,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-04-15 04:42:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:30,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:30,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:42:30,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75934304] [2021-04-15 04:42:30,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:42:30,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:42:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:42:30,903 INFO L87 Difference]: Start difference. First operand 35521 states and 147171 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:33,570 INFO L93 Difference]: Finished difference Result 62455 states and 255118 transitions. [2021-04-15 04:42:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:42:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:33,803 INFO L225 Difference]: With dead ends: 62455 [2021-04-15 04:42:33,803 INFO L226 Difference]: Without dead ends: 62400 [2021-04-15 04:42:33,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1375.6ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:42:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62400 states. [2021-04-15 04:42:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62400 to 36126. [2021-04-15 04:42:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36126 states, 36125 states have (on average 4.140013840830449) internal successors, (149558), 36125 states have internal predecessors, (149558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 149558 transitions. [2021-04-15 04:42:35,012 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 149558 transitions. Word has length 39 [2021-04-15 04:42:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:35,012 INFO L480 AbstractCegarLoop]: Abstraction has 36126 states and 149558 transitions. [2021-04-15 04:42:35,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 149558 transitions. [2021-04-15 04:42:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:35,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:35,089 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:35,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 04:42:35,293 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 24 times [2021-04-15 04:42:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:35,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140900397] [2021-04-15 04:42:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:35,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140900397] [2021-04-15 04:42:35,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325698698] [2021-04-15 04:42:35,640 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 [2021-04-15 04:42:35,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:42:35,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:35,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:42:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:35,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:35,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 44 [2021-04-15 04:42:35,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:35,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:35,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:35,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-04-15 04:42:36,061 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 35 treesize of output 27 [2021-04-15 04:42:36,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:36,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:36,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:36,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:42:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:36,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:36,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:42:36,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261595057] [2021-04-15 04:42:36,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:42:36,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:42:36,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:42:36,115 INFO L87 Difference]: Start difference. First operand 36126 states and 149558 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:36,723 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:42:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:38,440 INFO L93 Difference]: Finished difference Result 62047 states and 253181 transitions. [2021-04-15 04:42:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 04:42:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:38,826 INFO L225 Difference]: With dead ends: 62047 [2021-04-15 04:42:38,827 INFO L226 Difference]: Without dead ends: 61919 [2021-04-15 04:42:38,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1784.9ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 04:42:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61919 states. [2021-04-15 04:42:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61919 to 36244. [2021-04-15 04:42:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36244 states, 36243 states have (on average 4.138454322213945) internal successors, (149990), 36243 states have internal predecessors, (149990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36244 states to 36244 states and 149990 transitions. [2021-04-15 04:42:39,996 INFO L78 Accepts]: Start accepts. Automaton has 36244 states and 149990 transitions. Word has length 39 [2021-04-15 04:42:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:39,996 INFO L480 AbstractCegarLoop]: Abstraction has 36244 states and 149990 transitions. [2021-04-15 04:42:39,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 36244 states and 149990 transitions. [2021-04-15 04:42:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:40,088 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:40,089 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:40,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 04:42:40,290 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 25 times [2021-04-15 04:42:40,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:40,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87326037] [2021-04-15 04:42:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:40,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87326037] [2021-04-15 04:42:40,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332249209] [2021-04-15 04:42:40,622 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 [2021-04-15 04:42:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:40,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:40,813 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:42:40,814 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 28 treesize of output 16 [2021-04-15 04:42:40,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:40,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:40,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:40,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:42:40,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:42:40,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:40,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:40,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:40,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:42:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:40,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:40,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:42:40,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471194681] [2021-04-15 04:42:40,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:42:40,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:42:40,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:42:40,967 INFO L87 Difference]: Start difference. First operand 36244 states and 149990 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:42,752 INFO L93 Difference]: Finished difference Result 63583 states and 260022 transitions. [2021-04-15 04:42:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:42:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:42,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:42,980 INFO L225 Difference]: With dead ends: 63583 [2021-04-15 04:42:42,980 INFO L226 Difference]: Without dead ends: 63391 [2021-04-15 04:42:42,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1040.4ms TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:42:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2021-04-15 04:42:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 36222. [2021-04-15 04:42:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36222 states, 36221 states have (on average 4.139007757930482) internal successors, (149919), 36221 states have internal predecessors, (149919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36222 states to 36222 states and 149919 transitions. [2021-04-15 04:42:44,145 INFO L78 Accepts]: Start accepts. Automaton has 36222 states and 149919 transitions. Word has length 39 [2021-04-15 04:42:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:44,145 INFO L480 AbstractCegarLoop]: Abstraction has 36222 states and 149919 transitions. [2021-04-15 04:42:44,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 36222 states and 149919 transitions. [2021-04-15 04:42:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:44,221 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:44,221 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:44,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:44,426 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash 337270923, now seen corresponding path program 26 times [2021-04-15 04:42:44,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:44,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710223785] [2021-04-15 04:42:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:44,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710223785] [2021-04-15 04:42:44,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23199239] [2021-04-15 04:42:44,735 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 [2021-04-15 04:42:44,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:42:44,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:44,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:44,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:42:44,947 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 28 treesize of output 16 [2021-04-15 04:42:44,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:44,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:44,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:44,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:42:45,020 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 30 treesize of output 22 [2021-04-15 04:42:45,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:45,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:45,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:45,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-04-15 04:42:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:45,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:45,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:42:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081450139] [2021-04-15 04:42:45,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:42:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:42:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:42:45,098 INFO L87 Difference]: Start difference. First operand 36222 states and 149919 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:45,850 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:42:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:47,394 INFO L93 Difference]: Finished difference Result 90257 states and 367920 transitions. [2021-04-15 04:42:47,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:42:47,394 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:47,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:47,894 INFO L225 Difference]: With dead ends: 90257 [2021-04-15 04:42:47,894 INFO L226 Difference]: Without dead ends: 90202 [2021-04-15 04:42:47,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1387.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:42:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90202 states. [2021-04-15 04:42:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90202 to 36036. [2021-04-15 04:42:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.137810462050784) internal successors, (149106), 36035 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 149106 transitions. [2021-04-15 04:42:49,108 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 149106 transitions. Word has length 39 [2021-04-15 04:42:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:49,108 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 149106 transitions. [2021-04-15 04:42:49,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 149106 transitions. [2021-04-15 04:42:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:49,179 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:49,179 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:49,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 04:42:49,380 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash -571608753, now seen corresponding path program 27 times [2021-04-15 04:42:49,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:49,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198801121] [2021-04-15 04:42:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:49,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198801121] [2021-04-15 04:42:49,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100241907] [2021-04-15 04:42:49,736 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 [2021-04-15 04:42:49,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:42:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:42:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:42:49,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:49,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 36 [2021-04-15 04:42:49,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:49,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:50,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:50,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:89 [2021-04-15 04:42:50,164 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 35 treesize of output 27 [2021-04-15 04:42:50,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:50,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:50,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:42:50,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:16 [2021-04-15 04:42:50,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:42:50,213 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 9 treesize of output 5 [2021-04-15 04:42:50,214 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:42:50,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:50,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:50,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-04-15 04:42:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:50,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:50,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:42:50,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731507239] [2021-04-15 04:42:50,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:42:50,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:50,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:42:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:42:50,249 INFO L87 Difference]: Start difference. First operand 36036 states and 149106 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:51,169 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:42:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:53,181 INFO L93 Difference]: Finished difference Result 76321 states and 309332 transitions. [2021-04-15 04:42:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:42:53,181 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:53,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:53,644 INFO L225 Difference]: With dead ends: 76321 [2021-04-15 04:42:53,644 INFO L226 Difference]: Without dead ends: 76049 [2021-04-15 04:42:53,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 2012.5ms TimeCoverageRelationStatistics Valid=484, Invalid=2708, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:42:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76049 states. [2021-04-15 04:42:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76049 to 35555. [2021-04-15 04:42:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35555 states, 35554 states have (on average 4.1431906395904825) internal successors, (147307), 35554 states have internal predecessors, (147307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-04-15 04:42:54,797 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-04-15 04:42:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:54,797 INFO L480 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-04-15 04:42:54,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-04-15 04:42:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:54,866 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:54,866 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:55,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:55,074 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 28 times [2021-04-15 04:42:55,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:55,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825128627] [2021-04-15 04:42:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:55,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825128627] [2021-04-15 04:42:55,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380910485] [2021-04-15 04:42:55,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:42:55,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:42:55,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:42:55,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:42:55,605 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:42:55,605 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 28 treesize of output 16 [2021-04-15 04:42:55,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:55,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:55,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:55,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-04-15 04:42:55,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-04-15 04:42:55,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:42:55,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:42:55,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:42:55,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-04-15 04:42:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:55,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:42:55,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:42:55,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599694932] [2021-04-15 04:42:55,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:42:55,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:42:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:42:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:42:55,702 INFO L87 Difference]: Start difference. First operand 35555 states and 147307 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:42:57,434 INFO L93 Difference]: Finished difference Result 69258 states and 285506 transitions. [2021-04-15 04:42:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:42:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:42:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:42:57,668 INFO L225 Difference]: With dead ends: 69258 [2021-04-15 04:42:57,668 INFO L226 Difference]: Without dead ends: 69203 [2021-04-15 04:42:57,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 851.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:42:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69203 states. [2021-04-15 04:42:58,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69203 to 35829. [2021-04-15 04:42:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35829 states, 35828 states have (on average 4.142095567712404) internal successors, (148403), 35828 states have internal predecessors, (148403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:58,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35829 states to 35829 states and 148403 transitions. [2021-04-15 04:42:58,936 INFO L78 Accepts]: Start accepts. Automaton has 35829 states and 148403 transitions. Word has length 39 [2021-04-15 04:42:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:42:58,936 INFO L480 AbstractCegarLoop]: Abstraction has 35829 states and 148403 transitions. [2021-04-15 04:42:58,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:42:58,936 INFO L276 IsEmpty]: Start isEmpty. Operand 35829 states and 148403 transitions. [2021-04-15 04:42:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:42:59,024 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:42:59,024 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:42:59,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:42:59,224 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:42:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:42:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 29 times [2021-04-15 04:42:59,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:42:59,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896360533] [2021-04-15 04:42:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:42:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:42:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:42:59,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896360533] [2021-04-15 04:42:59,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350398951] [2021-04-15 04:42:59,561 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 [2021-04-15 04:42:59,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:42:59,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:42:59,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-04-15 04:42:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:00,211 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 32 treesize of output 16 [2021-04-15 04:43:00,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:00,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:00,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:43:00,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:47 [2021-04-15 04:43:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:00,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:43:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:43:00,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:43:00,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:00,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:00,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:00,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:13 [2021-04-15 04:43:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:00,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:00,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:43:00,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555487941] [2021-04-15 04:43:00,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:43:00,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:43:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:43:00,623 INFO L87 Difference]: Start difference. First operand 35829 states and 148403 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:03,791 INFO L93 Difference]: Finished difference Result 62177 states and 253641 transitions. [2021-04-15 04:43:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:43:03,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:03,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:04,013 INFO L225 Difference]: With dead ends: 62177 [2021-04-15 04:43:04,014 INFO L226 Difference]: Without dead ends: 61975 [2021-04-15 04:43:04,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2168.2ms TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:43:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61975 states. [2021-04-15 04:43:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61975 to 36176. [2021-04-15 04:43:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36176 states, 36175 states have (on average 4.138078783690394) internal successors, (149695), 36175 states have internal predecessors, (149695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36176 states to 36176 states and 149695 transitions. [2021-04-15 04:43:05,131 INFO L78 Accepts]: Start accepts. Automaton has 36176 states and 149695 transitions. Word has length 39 [2021-04-15 04:43:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:05,131 INFO L480 AbstractCegarLoop]: Abstraction has 36176 states and 149695 transitions. [2021-04-15 04:43:05,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36176 states and 149695 transitions. [2021-04-15 04:43:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:05,212 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:05,212 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:05,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 04:43:05,413 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:05,413 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 30 times [2021-04-15 04:43:05,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:05,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739998364] [2021-04-15 04:43:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:05,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739998364] [2021-04-15 04:43:05,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787885344] [2021-04-15 04:43:05,769 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 [2021-04-15 04:43:05,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:43:05,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:43:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:06,000 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:06,000 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 28 treesize of output 16 [2021-04-15 04:43:06,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:06,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:06,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:06,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-04-15 04:43:06,076 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 35 treesize of output 27 [2021-04-15 04:43:06,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:06,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:06,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:06,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:43:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:06,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:06,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:43:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212774691] [2021-04-15 04:43:06,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:43:06,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:43:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:43:06,126 INFO L87 Difference]: Start difference. First operand 36176 states and 149695 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:08,625 INFO L93 Difference]: Finished difference Result 78317 states and 318209 transitions. [2021-04-15 04:43:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:43:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:09,149 INFO L225 Difference]: With dead ends: 78317 [2021-04-15 04:43:09,149 INFO L226 Difference]: Without dead ends: 78101 [2021-04-15 04:43:09,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1497.0ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:43:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78101 states. [2021-04-15 04:43:10,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78101 to 35679. [2021-04-15 04:43:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35679 states, 35678 states have (on average 4.143029317786872) internal successors, (147815), 35678 states have internal predecessors, (147815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35679 states to 35679 states and 147815 transitions. [2021-04-15 04:43:10,508 INFO L78 Accepts]: Start accepts. Automaton has 35679 states and 147815 transitions. Word has length 39 [2021-04-15 04:43:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:10,508 INFO L480 AbstractCegarLoop]: Abstraction has 35679 states and 147815 transitions. [2021-04-15 04:43:10,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 35679 states and 147815 transitions. [2021-04-15 04:43:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:10,586 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:10,586 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:10,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:10,786 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:10,787 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 31 times [2021-04-15 04:43:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:10,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386159865] [2021-04-15 04:43:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:11,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386159865] [2021-04-15 04:43:11,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322846002] [2021-04-15 04:43:11,062 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 [2021-04-15 04:43:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:43:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:11,299 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 37 treesize of output 29 [2021-04-15 04:43:11,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:11,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:11,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:11,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:43:11,341 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:11,341 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 34 treesize of output 22 [2021-04-15 04:43:11,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:11,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:11,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:11,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-04-15 04:43:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:11,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:11,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:43:11,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682294697] [2021-04-15 04:43:11,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:43:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:43:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:43:11,396 INFO L87 Difference]: Start difference. First operand 35679 states and 147815 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:13,156 INFO L93 Difference]: Finished difference Result 71308 states and 293693 transitions. [2021-04-15 04:43:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:43:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:13,426 INFO L225 Difference]: With dead ends: 71308 [2021-04-15 04:43:13,426 INFO L226 Difference]: Without dead ends: 71253 [2021-04-15 04:43:13,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:43:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71253 states. [2021-04-15 04:43:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71253 to 36115. [2021-04-15 04:43:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36115 states, 36114 states have (on average 4.146120618042865) internal successors, (149733), 36114 states have internal predecessors, (149733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36115 states to 36115 states and 149733 transitions. [2021-04-15 04:43:14,708 INFO L78 Accepts]: Start accepts. Automaton has 36115 states and 149733 transitions. Word has length 39 [2021-04-15 04:43:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:14,708 INFO L480 AbstractCegarLoop]: Abstraction has 36115 states and 149733 transitions. [2021-04-15 04:43:14,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36115 states and 149733 transitions. [2021-04-15 04:43:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:14,785 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:14,785 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:14,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 04:43:14,985 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:14,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:14,986 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 32 times [2021-04-15 04:43:14,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:14,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895571381] [2021-04-15 04:43:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:15,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895571381] [2021-04-15 04:43:15,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149373540] [2021-04-15 04:43:15,276 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 [2021-04-15 04:43:15,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:43:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:15,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:43:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:15,511 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 37 treesize of output 29 [2021-04-15 04:43:15,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:15,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:15,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:15,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-04-15 04:43:15,591 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:15,592 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 41 treesize of output 29 [2021-04-15 04:43:15,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:15,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:15,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:15,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-04-15 04:43:15,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:15,636 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 16 [2021-04-15 04:43:15,638 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:43:15,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:15,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:43:15,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:43:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:15,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:15,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:43:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059389013] [2021-04-15 04:43:15,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:43:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:43:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:43:15,712 INFO L87 Difference]: Start difference. First operand 36115 states and 149733 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:18,378 INFO L93 Difference]: Finished difference Result 91528 states and 377511 transitions. [2021-04-15 04:43:18,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:43:18,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:18,986 INFO L225 Difference]: With dead ends: 91528 [2021-04-15 04:43:18,986 INFO L226 Difference]: Without dead ends: 91473 [2021-04-15 04:43:18,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1233.3ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:43:19,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91473 states. [2021-04-15 04:43:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91473 to 36355. [2021-04-15 04:43:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36355 states, 36354 states have (on average 4.147906695274248) internal successors, (150793), 36354 states have internal predecessors, (150793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36355 states to 36355 states and 150793 transitions. [2021-04-15 04:43:20,368 INFO L78 Accepts]: Start accepts. Automaton has 36355 states and 150793 transitions. Word has length 39 [2021-04-15 04:43:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:20,368 INFO L480 AbstractCegarLoop]: Abstraction has 36355 states and 150793 transitions. [2021-04-15 04:43:20,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 36355 states and 150793 transitions. [2021-04-15 04:43:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:20,453 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:20,453 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:20,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:20,654 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:20,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 33 times [2021-04-15 04:43:20,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120036311] [2021-04-15 04:43:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:20,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120036311] [2021-04-15 04:43:20,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063539373] [2021-04-15 04:43:20,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:43:20,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:43:20,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:43:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-04-15 04:43:21,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:21,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:21,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:21,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-04-15 04:43:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:21,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:21,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-04-15 04:43:21,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:21,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:21,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 04:43:21,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-04-15 04:43:21,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:21,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 16 [2021-04-15 04:43:21,352 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:43:21,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:21,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 5 [2021-04-15 04:43:21,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:21,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:21,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 04:43:21,401 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-04-15 04:43:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:21,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:21,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-04-15 04:43:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068951311] [2021-04-15 04:43:21,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:43:21,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:21,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:43:21,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:43:21,516 INFO L87 Difference]: Start difference. First operand 36355 states and 150793 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:26,569 INFO L93 Difference]: Finished difference Result 96064 states and 394680 transitions. [2021-04-15 04:43:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 04:43:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:26,916 INFO L225 Difference]: With dead ends: 96064 [2021-04-15 04:43:26,916 INFO L226 Difference]: Without dead ends: 95970 [2021-04-15 04:43:26,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2884.7ms TimeCoverageRelationStatistics Valid=780, Invalid=5226, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 04:43:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95970 states. [2021-04-15 04:43:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95970 to 37015. [2021-04-15 04:43:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37015 states, 37014 states have (on average 4.146566164154104) internal successors, (153481), 37014 states have internal predecessors, (153481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37015 states to 37015 states and 153481 transitions. [2021-04-15 04:43:28,304 INFO L78 Accepts]: Start accepts. Automaton has 37015 states and 153481 transitions. Word has length 39 [2021-04-15 04:43:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:28,304 INFO L480 AbstractCegarLoop]: Abstraction has 37015 states and 153481 transitions. [2021-04-15 04:43:28,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 37015 states and 153481 transitions. [2021-04-15 04:43:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:28,375 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:28,375 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:28,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 04:43:28,576 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:28,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash -555822351, now seen corresponding path program 34 times [2021-04-15 04:43:28,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:28,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765662744] [2021-04-15 04:43:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765662744] [2021-04-15 04:43:28,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829341041] [2021-04-15 04:43:28,887 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 [2021-04-15 04:43:28,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:43:28,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:28,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:43:28,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:29,372 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 04:43:29,383 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 37 treesize of output 29 [2021-04-15 04:43:29,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:29,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:29,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:29,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:43:29,463 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:29,463 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 39 treesize of output 27 [2021-04-15 04:43:29,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:29,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:29,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:29,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:43:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:29,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:29,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:43:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843763268] [2021-04-15 04:43:29,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:43:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:43:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:43:29,515 INFO L87 Difference]: Start difference. First operand 37015 states and 153481 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:32,121 INFO L93 Difference]: Finished difference Result 106237 states and 431864 transitions. [2021-04-15 04:43:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:43:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:32,512 INFO L225 Difference]: With dead ends: 106237 [2021-04-15 04:43:32,512 INFO L226 Difference]: Without dead ends: 106182 [2021-04-15 04:43:32,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1550.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:43:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106182 states. [2021-04-15 04:43:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106182 to 36507. [2021-04-15 04:43:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36507 states, 36506 states have (on average 4.150577987180189) internal successors, (151521), 36506 states have internal predecessors, (151521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36507 states to 36507 states and 151521 transitions. [2021-04-15 04:43:34,104 INFO L78 Accepts]: Start accepts. Automaton has 36507 states and 151521 transitions. Word has length 39 [2021-04-15 04:43:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:34,104 INFO L480 AbstractCegarLoop]: Abstraction has 36507 states and 151521 transitions. [2021-04-15 04:43:34,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 36507 states and 151521 transitions. [2021-04-15 04:43:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:34,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:34,187 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:34,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 04:43:34,387 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 35 times [2021-04-15 04:43:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:34,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589287683] [2021-04-15 04:43:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:34,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589287683] [2021-04-15 04:43:34,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122176498] [2021-04-15 04:43:34,780 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 [2021-04-15 04:43:34,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:43:34,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:34,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:43:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:35,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:35,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 55 [2021-04-15 04:43:35,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:43:35,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:35,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:43:35,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:59 [2021-04-15 04:43:35,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:43:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:43:35,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-04-15 04:43:35,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:35,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:35,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:43:35,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-04-15 04:43:35,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:35,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:35,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-04-15 04:43:35,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:43:35,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:35,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:43:35,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:43:35,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:35,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:35,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:43:35,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829307939] [2021-04-15 04:43:35,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:43:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:43:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:43:35,920 INFO L87 Difference]: Start difference. First operand 36507 states and 151521 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:40,081 INFO L93 Difference]: Finished difference Result 68781 states and 280972 transitions. [2021-04-15 04:43:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:43:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:40,306 INFO L225 Difference]: With dead ends: 68781 [2021-04-15 04:43:40,306 INFO L226 Difference]: Without dead ends: 68560 [2021-04-15 04:43:40,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 3342.3ms TimeCoverageRelationStatistics Valid=732, Invalid=4380, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:43:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68560 states. [2021-04-15 04:43:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68560 to 37012. [2021-04-15 04:43:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37012 states, 37011 states have (on average 4.144254410850828) internal successors, (153383), 37011 states have internal predecessors, (153383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37012 states to 37012 states and 153383 transitions. [2021-04-15 04:43:41,444 INFO L78 Accepts]: Start accepts. Automaton has 37012 states and 153383 transitions. Word has length 39 [2021-04-15 04:43:41,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:41,445 INFO L480 AbstractCegarLoop]: Abstraction has 37012 states and 153383 transitions. [2021-04-15 04:43:41,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:41,445 INFO L276 IsEmpty]: Start isEmpty. Operand 37012 states and 153383 transitions. [2021-04-15 04:43:41,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:41,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:41,522 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:41,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:41,722 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:41,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1669092457, now seen corresponding path program 36 times [2021-04-15 04:43:41,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:41,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143851988] [2021-04-15 04:43:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:42,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143851988] [2021-04-15 04:43:42,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698204371] [2021-04-15 04:43:42,119 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 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 [2021-04-15 04:43:42,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:43:42,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:42,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:43:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:42,388 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:42,389 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 33 treesize of output 21 [2021-04-15 04:43:42,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:42,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:42,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:42,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-04-15 04:43:42,431 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 35 treesize of output 27 [2021-04-15 04:43:42,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:42,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:42,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:42,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:43:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:42,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:42,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:43:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161466882] [2021-04-15 04:43:42,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:43:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:43:42,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:43:42,484 INFO L87 Difference]: Start difference. First operand 37012 states and 153383 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:42,873 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:43:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:45,120 INFO L93 Difference]: Finished difference Result 79074 states and 321254 transitions. [2021-04-15 04:43:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:43:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:45,642 INFO L225 Difference]: With dead ends: 79074 [2021-04-15 04:43:45,643 INFO L226 Difference]: Without dead ends: 78850 [2021-04-15 04:43:45,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1556.1ms TimeCoverageRelationStatistics Valid=422, Invalid=2028, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:43:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78850 states. [2021-04-15 04:43:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78850 to 36693. [2021-04-15 04:43:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 4.1486155020167885) internal successors, (152221), 36692 states have internal predecessors, (152221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 152221 transitions. [2021-04-15 04:43:47,185 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 152221 transitions. Word has length 39 [2021-04-15 04:43:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:47,185 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 152221 transitions. [2021-04-15 04:43:47,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 152221 transitions. [2021-04-15 04:43:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:47,264 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:47,264 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:47,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:47,464 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:47,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:47,465 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 37 times [2021-04-15 04:43:47,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:47,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046684020] [2021-04-15 04:43:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:47,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046684020] [2021-04-15 04:43:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557659888] [2021-04-15 04:43:47,871 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 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 [2021-04-15 04:43:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:43:47,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:48,133 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 37 treesize of output 29 [2021-04-15 04:43:48,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:48,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:43:48,175 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:48,175 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 39 treesize of output 27 [2021-04-15 04:43:48,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:48,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:43:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:48,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:48,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:43:48,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970788308] [2021-04-15 04:43:48,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:43:48,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:48,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:43:48,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:43:48,229 INFO L87 Difference]: Start difference. First operand 36693 states and 152221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:50,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:50,526 INFO L93 Difference]: Finished difference Result 80869 states and 329178 transitions. [2021-04-15 04:43:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:43:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:50,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:50,812 INFO L225 Difference]: With dead ends: 80869 [2021-04-15 04:43:50,812 INFO L226 Difference]: Without dead ends: 80701 [2021-04-15 04:43:50,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1234.2ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:43:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80701 states. [2021-04-15 04:43:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80701 to 36755. [2021-04-15 04:43:52,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36755 states, 36754 states have (on average 4.149561952440551) internal successors, (152513), 36754 states have internal predecessors, (152513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36755 states to 36755 states and 152513 transitions. [2021-04-15 04:43:52,232 INFO L78 Accepts]: Start accepts. Automaton has 36755 states and 152513 transitions. Word has length 39 [2021-04-15 04:43:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:52,232 INFO L480 AbstractCegarLoop]: Abstraction has 36755 states and 152513 transitions. [2021-04-15 04:43:52,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 36755 states and 152513 transitions. [2021-04-15 04:43:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:52,312 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:52,313 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:52,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:52,513 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 38 times [2021-04-15 04:43:52,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:52,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805001465] [2021-04-15 04:43:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:52,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805001465] [2021-04-15 04:43:52,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897222449] [2021-04-15 04:43:52,940 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 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 [2021-04-15 04:43:52,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:43:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:52,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:43:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:53,479 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 37 treesize of output 29 [2021-04-15 04:43:53,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:53,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:53,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:53,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:43:53,530 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:43:53,530 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 39 treesize of output 27 [2021-04-15 04:43:53,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:53,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:53,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:53,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:43:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:53,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:53,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:43:53,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897971535] [2021-04-15 04:43:53,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:43:53,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:53,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:43:53,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:43:53,585 INFO L87 Difference]: Start difference. First operand 36755 states and 152513 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:55,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:55,289 INFO L93 Difference]: Finished difference Result 67634 states and 276737 transitions. [2021-04-15 04:43:55,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:43:55,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:43:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:55,508 INFO L225 Difference]: With dead ends: 67634 [2021-04-15 04:43:55,509 INFO L226 Difference]: Without dead ends: 67544 [2021-04-15 04:43:55,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1033.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:43:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67544 states. [2021-04-15 04:43:56,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67544 to 36721. [2021-04-15 04:43:56,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.15291394335512) internal successors, (152495), 36720 states have internal predecessors, (152495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152495 transitions. [2021-04-15 04:43:56,719 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152495 transitions. Word has length 39 [2021-04-15 04:43:56,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:56,719 INFO L480 AbstractCegarLoop]: Abstraction has 36721 states and 152495 transitions. [2021-04-15 04:43:56,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:43:56,719 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152495 transitions. [2021-04-15 04:43:56,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:43:56,799 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:56,799 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:56,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 04:43:57,000 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:57,000 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 39 times [2021-04-15 04:43:57,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:57,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393862471] [2021-04-15 04:43:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:57,280 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-04-15 04:43:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:57,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393862471] [2021-04-15 04:43:57,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474997540] [2021-04-15 04:43:57,608 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 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 [2021-04-15 04:43:57,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:43:57,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:43:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:43:57,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 41 [2021-04-15 04:43:57,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:57,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:57,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:57,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-04-15 04:43:58,040 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 35 treesize of output 27 [2021-04-15 04:43:58,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:58,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:58,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:58,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:43:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:43:58,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:58,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:43:58,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214446577] [2021-04-15 04:43:58,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:43:58,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:43:58,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:43:58,094 INFO L87 Difference]: Start difference. First operand 36721 states and 152495 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:00,258 INFO L93 Difference]: Finished difference Result 61224 states and 250106 transitions. [2021-04-15 04:44:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:44:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:00,459 INFO L225 Difference]: With dead ends: 61224 [2021-04-15 04:44:00,459 INFO L226 Difference]: Without dead ends: 61096 [2021-04-15 04:44:00,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1515.0ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:44:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61096 states. [2021-04-15 04:44:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61096 to 37078. [2021-04-15 04:44:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37078 states, 37077 states have (on average 4.147342017962618) internal successors, (153771), 37077 states have internal predecessors, (153771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37078 states to 37078 states and 153771 transitions. [2021-04-15 04:44:01,633 INFO L78 Accepts]: Start accepts. Automaton has 37078 states and 153771 transitions. Word has length 39 [2021-04-15 04:44:01,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:01,633 INFO L480 AbstractCegarLoop]: Abstraction has 37078 states and 153771 transitions. [2021-04-15 04:44:01,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 37078 states and 153771 transitions. [2021-04-15 04:44:01,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:01,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:01,714 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:01,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:01,915 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:01,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2130742231, now seen corresponding path program 40 times [2021-04-15 04:44:01,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:01,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933314003] [2021-04-15 04:44:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933314003] [2021-04-15 04:44:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667720948] [2021-04-15 04:44:02,298 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 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 [2021-04-15 04:44:02,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:44:02,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:02,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:02,544 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:02,545 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 33 treesize of output 21 [2021-04-15 04:44:02,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:02,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:02,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:02,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:44:02,625 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 35 treesize of output 27 [2021-04-15 04:44:02,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:02,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:02,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:02,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:02,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:02,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:02,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26605840] [2021-04-15 04:44:02,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:02,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:02,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:02,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:02,678 INFO L87 Difference]: Start difference. First operand 37078 states and 153771 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:04,758 INFO L93 Difference]: Finished difference Result 78252 states and 318289 transitions. [2021-04-15 04:44:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:44:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:04,997 INFO L225 Difference]: With dead ends: 78252 [2021-04-15 04:44:04,997 INFO L226 Difference]: Without dead ends: 78068 [2021-04-15 04:44:04,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1270.5ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:44:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78068 states. [2021-04-15 04:44:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78068 to 36745. [2021-04-15 04:44:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36745 states, 36744 states have (on average 4.1524874809492704) internal successors, (152579), 36744 states have internal predecessors, (152579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 152579 transitions. [2021-04-15 04:44:06,259 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 152579 transitions. Word has length 39 [2021-04-15 04:44:06,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:06,260 INFO L480 AbstractCegarLoop]: Abstraction has 36745 states and 152579 transitions. [2021-04-15 04:44:06,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 152579 transitions. [2021-04-15 04:44:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:06,337 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:06,337 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:06,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:06,538 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 41 times [2021-04-15 04:44:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:06,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477183277] [2021-04-15 04:44:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:06,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477183277] [2021-04-15 04:44:06,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130562681] [2021-04-15 04:44:06,938 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 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 [2021-04-15 04:44:06,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:44:06,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:06,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:44:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:07,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:07,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 55 [2021-04-15 04:44:07,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:44:07,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:07,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:44:07,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:56 [2021-04-15 04:44:07,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:07,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:07,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-04-15 04:44:07,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:07,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:07,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:44:07,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:27 [2021-04-15 04:44:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:07,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:07,707 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 20 treesize of output 39 [2021-04-15 04:44:07,711 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:07,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:07,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:07,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:44:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:08,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:08,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:44:08,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750721008] [2021-04-15 04:44:08,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:44:08,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:08,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:44:08,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:44:08,002 INFO L87 Difference]: Start difference. First operand 36745 states and 152579 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:13,684 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-04-15 04:44:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:16,879 INFO L93 Difference]: Finished difference Result 81058 states and 330146 transitions. [2021-04-15 04:44:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-04-15 04:44:16,879 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:17,126 INFO L225 Difference]: With dead ends: 81058 [2021-04-15 04:44:17,126 INFO L226 Difference]: Without dead ends: 80725 [2021-04-15 04:44:17,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 6206.0ms TimeCoverageRelationStatistics Valid=1233, Invalid=10977, Unknown=0, NotChecked=0, Total=12210 [2021-04-15 04:44:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80725 states. [2021-04-15 04:44:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80725 to 37394. [2021-04-15 04:44:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37394 states, 37393 states have (on average 4.148236300911935) internal successors, (155115), 37393 states have internal predecessors, (155115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37394 states to 37394 states and 155115 transitions. [2021-04-15 04:44:18,302 INFO L78 Accepts]: Start accepts. Automaton has 37394 states and 155115 transitions. Word has length 39 [2021-04-15 04:44:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:18,302 INFO L480 AbstractCegarLoop]: Abstraction has 37394 states and 155115 transitions. [2021-04-15 04:44:18,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 37394 states and 155115 transitions. [2021-04-15 04:44:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:18,375 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:18,375 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:18,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:18,576 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 42 times [2021-04-15 04:44:18,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:18,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10568537] [2021-04-15 04:44:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:19,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10568537] [2021-04-15 04:44:19,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571010863] [2021-04-15 04:44:19,011 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 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 [2021-04-15 04:44:19,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:44:19,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:19,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:44:19,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:19,308 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:19,308 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 33 treesize of output 21 [2021-04-15 04:44:19,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:19,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:19,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:19,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-04-15 04:44:19,355 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 35 treesize of output 27 [2021-04-15 04:44:19,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:19,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:19,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:19,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:19,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:19,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:19,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640027947] [2021-04-15 04:44:19,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:19,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:19,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:19,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:19,416 INFO L87 Difference]: Start difference. First operand 37394 states and 155115 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:21,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:21,808 INFO L93 Difference]: Finished difference Result 79507 states and 323183 transitions. [2021-04-15 04:44:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:44:21,809 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:21,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:22,061 INFO L225 Difference]: With dead ends: 79507 [2021-04-15 04:44:22,061 INFO L226 Difference]: Without dead ends: 79283 [2021-04-15 04:44:22,062 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1729.9ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:44:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79283 states. [2021-04-15 04:44:23,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79283 to 37270. [2021-04-15 04:44:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37270 states, 37269 states have (on average 4.150178432477394) internal successors, (154673), 37269 states have internal predecessors, (154673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37270 states to 37270 states and 154673 transitions. [2021-04-15 04:44:23,326 INFO L78 Accepts]: Start accepts. Automaton has 37270 states and 154673 transitions. Word has length 39 [2021-04-15 04:44:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:23,326 INFO L480 AbstractCegarLoop]: Abstraction has 37270 states and 154673 transitions. [2021-04-15 04:44:23,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37270 states and 154673 transitions. [2021-04-15 04:44:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:23,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:23,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:23,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:23,600 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 43 times [2021-04-15 04:44:23,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:23,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107566559] [2021-04-15 04:44:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:24,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107566559] [2021-04-15 04:44:24,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962174692] [2021-04-15 04:44:24,283 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 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 [2021-04-15 04:44:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:24,585 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 37 treesize of output 29 [2021-04-15 04:44:24,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:24,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:24,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:24,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:44:24,637 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:24,637 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 39 treesize of output 27 [2021-04-15 04:44:24,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:24,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:24,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:24,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:44:24,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:24,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:24,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:24,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165422694] [2021-04-15 04:44:24,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:24,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:24,700 INFO L87 Difference]: Start difference. First operand 37270 states and 154673 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:26,857 INFO L93 Difference]: Finished difference Result 81312 states and 331062 transitions. [2021-04-15 04:44:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:44:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:27,104 INFO L225 Difference]: With dead ends: 81312 [2021-04-15 04:44:27,104 INFO L226 Difference]: Without dead ends: 81160 [2021-04-15 04:44:27,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1372.0ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:44:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2021-04-15 04:44:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 37320. [2021-04-15 04:44:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37320 states, 37319 states have (on average 4.150620327447145) internal successors, (154897), 37319 states have internal predecessors, (154897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37320 states to 37320 states and 154897 transitions. [2021-04-15 04:44:28,290 INFO L78 Accepts]: Start accepts. Automaton has 37320 states and 154897 transitions. Word has length 39 [2021-04-15 04:44:28,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:28,290 INFO L480 AbstractCegarLoop]: Abstraction has 37320 states and 154897 transitions. [2021-04-15 04:44:28,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 37320 states and 154897 transitions. [2021-04-15 04:44:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:28,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:28,360 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:28,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:28,560 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 44 times [2021-04-15 04:44:28,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:28,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716611951] [2021-04-15 04:44:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:28,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716611951] [2021-04-15 04:44:28,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019333011] [2021-04-15 04:44:28,968 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 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 [2021-04-15 04:44:28,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:44:28,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:28,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:29,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 04:44:29,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:29,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:29,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:29,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:44:29,323 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:29,323 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 39 treesize of output 27 [2021-04-15 04:44:29,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:29,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:29,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:29,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:44:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:29,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:29,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:29,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841460498] [2021-04-15 04:44:29,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:29,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:29,386 INFO L87 Difference]: Start difference. First operand 37320 states and 154897 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:30,811 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-04-15 04:44:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:31,471 INFO L93 Difference]: Finished difference Result 68093 states and 278664 transitions. [2021-04-15 04:44:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:44:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:31,683 INFO L225 Difference]: With dead ends: 68093 [2021-04-15 04:44:31,683 INFO L226 Difference]: Without dead ends: 68003 [2021-04-15 04:44:31,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1363.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:44:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68003 states. [2021-04-15 04:44:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68003 to 37072. [2021-04-15 04:44:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37072 states, 37071 states have (on average 4.1516279571632815) internal successors, (153905), 37071 states have internal predecessors, (153905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37072 states to 37072 states and 153905 transitions. [2021-04-15 04:44:32,847 INFO L78 Accepts]: Start accepts. Automaton has 37072 states and 153905 transitions. Word has length 39 [2021-04-15 04:44:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:32,847 INFO L480 AbstractCegarLoop]: Abstraction has 37072 states and 153905 transitions. [2021-04-15 04:44:32,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 37072 states and 153905 transitions. [2021-04-15 04:44:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:32,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:32,924 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:33,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:33,125 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1034892989, now seen corresponding path program 45 times [2021-04-15 04:44:33,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:33,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128202013] [2021-04-15 04:44:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:33,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128202013] [2021-04-15 04:44:33,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28222648] [2021-04-15 04:44:33,463 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 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 [2021-04-15 04:44:33,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:44:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:44:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:33,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:33,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 36 [2021-04-15 04:44:33,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:33,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:33,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:33,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-04-15 04:44:33,885 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 30 treesize of output 22 [2021-04-15 04:44:33,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:33,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:33,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:33,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:44:33,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:33,976 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 16 [2021-04-15 04:44:33,978 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:33,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:33,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:33,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:44:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:34,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:34,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-04-15 04:44:34,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548313327] [2021-04-15 04:44:34,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:44:34,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:34,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:44:34,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:44:34,054 INFO L87 Difference]: Start difference. First operand 37072 states and 153905 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:37,213 INFO L93 Difference]: Finished difference Result 68200 states and 279286 transitions. [2021-04-15 04:44:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:44:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:37,637 INFO L225 Difference]: With dead ends: 68200 [2021-04-15 04:44:37,637 INFO L226 Difference]: Without dead ends: 68145 [2021-04-15 04:44:37,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2023.4ms TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:44:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68145 states. [2021-04-15 04:44:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68145 to 37651. [2021-04-15 04:44:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37651 states, 37650 states have (on average 4.149349269588313) internal successors, (156223), 37650 states have internal predecessors, (156223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37651 states to 37651 states and 156223 transitions. [2021-04-15 04:44:38,574 INFO L78 Accepts]: Start accepts. Automaton has 37651 states and 156223 transitions. Word has length 39 [2021-04-15 04:44:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:38,574 INFO L480 AbstractCegarLoop]: Abstraction has 37651 states and 156223 transitions. [2021-04-15 04:44:38,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 37651 states and 156223 transitions. [2021-04-15 04:44:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:38,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:38,877 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:39,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:39,081 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash 899626485, now seen corresponding path program 46 times [2021-04-15 04:44:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:39,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984702051] [2021-04-15 04:44:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984702051] [2021-04-15 04:44:39,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207103972] [2021-04-15 04:44:39,488 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 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 [2021-04-15 04:44:39,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:44:39,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:39,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:39,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:39,716 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:39,717 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 28 treesize of output 16 [2021-04-15 04:44:39,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:39,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:39,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:39,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-04-15 04:44:39,845 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 35 treesize of output 27 [2021-04-15 04:44:39,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:39,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:39,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:39,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:39,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:39,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:39,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504658038] [2021-04-15 04:44:39,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:39,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:39,907 INFO L87 Difference]: Start difference. First operand 37651 states and 156223 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:42,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:42,106 INFO L93 Difference]: Finished difference Result 65825 states and 269786 transitions. [2021-04-15 04:44:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:44:42,107 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:42,309 INFO L225 Difference]: With dead ends: 65825 [2021-04-15 04:44:42,309 INFO L226 Difference]: Without dead ends: 65609 [2021-04-15 04:44:42,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1479.8ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:44:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65609 states. [2021-04-15 04:44:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65609 to 37607. [2021-04-15 04:44:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37607 states, 37606 states have (on average 4.150002659150136) internal successors, (156065), 37606 states have internal predecessors, (156065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37607 states to 37607 states and 156065 transitions. [2021-04-15 04:44:43,498 INFO L78 Accepts]: Start accepts. Automaton has 37607 states and 156065 transitions. Word has length 39 [2021-04-15 04:44:43,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:43,499 INFO L480 AbstractCegarLoop]: Abstraction has 37607 states and 156065 transitions. [2021-04-15 04:44:43,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 37607 states and 156065 transitions. [2021-04-15 04:44:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:43,574 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:43,574 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:43,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 04:44:43,785 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1502735341, now seen corresponding path program 47 times [2021-04-15 04:44:43,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:43,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938060933] [2021-04-15 04:44:43,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938060933] [2021-04-15 04:44:44,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718602771] [2021-04-15 04:44:44,234 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 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 [2021-04-15 04:44:44,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:44:44,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:44,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:44:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:44,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2021-04-15 04:44:44,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:44,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:44,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:44:44,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:44 [2021-04-15 04:44:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:44,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:44,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:44,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:44,954 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 37 treesize of output 27 [2021-04-15 04:44:44,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:44,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:44,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:44:44,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-04-15 04:44:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:45,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:45,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:45,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:45,070 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 20 treesize of output 39 [2021-04-15 04:44:45,074 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:45,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:45,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:45,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:44:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:45,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:45,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:44:45,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13019170] [2021-04-15 04:44:45,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:44:45,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:45,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:44:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:44:45,165 INFO L87 Difference]: Start difference. First operand 37607 states and 156065 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:46,705 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-04-15 04:44:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:50,759 INFO L93 Difference]: Finished difference Result 70286 states and 287534 transitions. [2021-04-15 04:44:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 04:44:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:50,974 INFO L225 Difference]: With dead ends: 70286 [2021-04-15 04:44:50,975 INFO L226 Difference]: Without dead ends: 70065 [2021-04-15 04:44:50,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 3608.3ms TimeCoverageRelationStatistics Valid=732, Invalid=4238, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:44:51,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70065 states. [2021-04-15 04:44:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70065 to 37939. [2021-04-15 04:44:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37939 states, 37938 states have (on average 4.146370393800411) internal successors, (157305), 37938 states have internal predecessors, (157305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:52,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37939 states to 37939 states and 157305 transitions. [2021-04-15 04:44:52,215 INFO L78 Accepts]: Start accepts. Automaton has 37939 states and 157305 transitions. Word has length 39 [2021-04-15 04:44:52,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:52,215 INFO L480 AbstractCegarLoop]: Abstraction has 37939 states and 157305 transitions. [2021-04-15 04:44:52,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 37939 states and 157305 transitions. [2021-04-15 04:44:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:52,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:52,299 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:44:52,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:52,499 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:52,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1438695687, now seen corresponding path program 48 times [2021-04-15 04:44:52,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:52,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308834843] [2021-04-15 04:44:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:52,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308834843] [2021-04-15 04:44:52,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828494470] [2021-04-15 04:44:52,862 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 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 [2021-04-15 04:44:52,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:44:52,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:52,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:44:52,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:53,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:53,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 44 [2021-04-15 04:44:53,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:53,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:53,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:44:53,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-04-15 04:44:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:53,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:53,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-04-15 04:44:53,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:53,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:53,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:53,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:12 [2021-04-15 04:44:53,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:53,597 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 13 treesize of output 18 [2021-04-15 04:44:53,599 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:44:53,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:53,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:53,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:14 [2021-04-15 04:44:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:44:53,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:53,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-04-15 04:44:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215521094] [2021-04-15 04:44:53,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:44:53,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:53,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:44:53,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:44:53,676 INFO L87 Difference]: Start difference. First operand 37939 states and 157305 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:44:55,500 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-04-15 04:44:56,682 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-04-15 04:44:57,234 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-04-15 04:44:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:58,389 INFO L93 Difference]: Finished difference Result 81507 states and 329555 transitions. [2021-04-15 04:44:58,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:44:58,390 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:44:58,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:58,819 INFO L225 Difference]: With dead ends: 81507 [2021-04-15 04:44:58,820 INFO L226 Difference]: Without dead ends: 81409 [2021-04-15 04:44:58,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3174.2ms TimeCoverageRelationStatistics Valid=774, Invalid=3782, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 04:44:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81409 states. [2021-04-15 04:44:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81409 to 38068. [2021-04-15 04:44:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38068 states, 38067 states have (on average 4.1451388341608215) internal successors, (157793), 38067 states have internal predecessors, (157793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38068 states to 38068 states and 157793 transitions. [2021-04-15 04:45:00,094 INFO L78 Accepts]: Start accepts. Automaton has 38068 states and 157793 transitions. Word has length 39 [2021-04-15 04:45:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:00,094 INFO L480 AbstractCegarLoop]: Abstraction has 38068 states and 157793 transitions. [2021-04-15 04:45:00,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:00,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38068 states and 157793 transitions. [2021-04-15 04:45:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:00,165 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:00,165 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:00,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 04:45:00,366 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:00,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1311781951, now seen corresponding path program 49 times [2021-04-15 04:45:00,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:00,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230301892] [2021-04-15 04:45:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:00,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230301892] [2021-04-15 04:45:00,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820481189] [2021-04-15 04:45:00,812 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 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 [2021-04-15 04:45:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:00,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:00,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:01,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:01,057 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 28 treesize of output 16 [2021-04-15 04:45:01,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:01,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:01,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:01,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-04-15 04:45:01,192 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 35 treesize of output 27 [2021-04-15 04:45:01,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:01,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:01,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:01,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:45:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:01,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:01,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:01,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518505293] [2021-04-15 04:45:01,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:01,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:01,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:01,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:01,261 INFO L87 Difference]: Start difference. First operand 38068 states and 157793 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:03,559 INFO L93 Difference]: Finished difference Result 80010 states and 325453 transitions. [2021-04-15 04:45:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:45:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:03,853 INFO L225 Difference]: With dead ends: 80010 [2021-04-15 04:45:03,853 INFO L226 Difference]: Without dead ends: 79826 [2021-04-15 04:45:03,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1599.8ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:45:03,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79826 states. [2021-04-15 04:45:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79826 to 37815. [2021-04-15 04:45:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37815 states, 37814 states have (on average 4.1485693129528745) internal successors, (156874), 37814 states have internal predecessors, (156874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37815 states to 37815 states and 156874 transitions. [2021-04-15 04:45:05,307 INFO L78 Accepts]: Start accepts. Automaton has 37815 states and 156874 transitions. Word has length 39 [2021-04-15 04:45:05,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:05,308 INFO L480 AbstractCegarLoop]: Abstraction has 37815 states and 156874 transitions. [2021-04-15 04:45:05,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:05,308 INFO L276 IsEmpty]: Start isEmpty. Operand 37815 states and 156874 transitions. [2021-04-15 04:45:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:05,392 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:05,392 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:05,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 04:45:05,593 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1564579539, now seen corresponding path program 50 times [2021-04-15 04:45:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:05,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424231821] [2021-04-15 04:45:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424231821] [2021-04-15 04:45:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863583404] [2021-04-15 04:45:05,958 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 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 [2021-04-15 04:45:05,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:45:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:45:05,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:06,243 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:06,243 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 28 treesize of output 16 [2021-04-15 04:45:06,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:45:06,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-04-15 04:45:06,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:45:06,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,390 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 16 [2021-04-15 04:45:06,392 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:06,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:06,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:45:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:06,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:06,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:45:06,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832851229] [2021-04-15 04:45:06,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:45:06,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:06,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:45:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:45:06,455 INFO L87 Difference]: Start difference. First operand 37815 states and 156874 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:09,512 INFO L93 Difference]: Finished difference Result 81479 states and 335542 transitions. [2021-04-15 04:45:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:45:09,513 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:10,030 INFO L225 Difference]: With dead ends: 81479 [2021-04-15 04:45:10,030 INFO L226 Difference]: Without dead ends: 81424 [2021-04-15 04:45:10,031 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1834.5ms TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:45:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81424 states. [2021-04-15 04:45:10,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81424 to 38089. [2021-04-15 04:45:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38089 states, 38088 states have (on average 4.147500525099769) internal successors, (157970), 38088 states have internal predecessors, (157970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38089 states to 38089 states and 157970 transitions. [2021-04-15 04:45:11,400 INFO L78 Accepts]: Start accepts. Automaton has 38089 states and 157970 transitions. Word has length 39 [2021-04-15 04:45:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:11,400 INFO L480 AbstractCegarLoop]: Abstraction has 38089 states and 157970 transitions. [2021-04-15 04:45:11,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 38089 states and 157970 transitions. [2021-04-15 04:45:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:11,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:11,487 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:11,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-04-15 04:45:11,688 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash 369939935, now seen corresponding path program 51 times [2021-04-15 04:45:11,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:11,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234800682] [2021-04-15 04:45:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234800682] [2021-04-15 04:45:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724208789] [2021-04-15 04:45:12,135 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 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 [2021-04-15 04:45:12,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:45:12,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:12,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:45:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:12,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:12,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:12,585 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-04-15 04:45:12,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:12,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:12,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:45:12,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:55 [2021-04-15 04:45:12,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:12,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-04-15 04:45:12,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:12,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:12,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:12,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:108 [2021-04-15 04:45:13,104 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-04-15 04:45:13,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-04-15 04:45:13,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:13,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 9 [2021-04-15 04:45:13,157 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:45:13,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:45:13,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:13,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:45:13,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:13,200 INFO L628 ElimStorePlain]: treesize reduction 115, result has 11.5 percent of original size [2021-04-15 04:45:13,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:13,201 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:207, output treesize:13 [2021-04-15 04:45:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:13,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:13,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-04-15 04:45:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640927529] [2021-04-15 04:45:13,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:45:13,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:13,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:45:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:45:13,314 INFO L87 Difference]: Start difference. First operand 38089 states and 157970 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:18,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:18,536 INFO L93 Difference]: Finished difference Result 63464 states and 258675 transitions. [2021-04-15 04:45:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:45:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:18,737 INFO L225 Difference]: With dead ends: 63464 [2021-04-15 04:45:18,737 INFO L226 Difference]: Without dead ends: 63308 [2021-04-15 04:45:18,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 3514.3ms TimeCoverageRelationStatistics Valid=739, Invalid=4231, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:45:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63308 states. [2021-04-15 04:45:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63308 to 38367. [2021-04-15 04:45:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38367 states, 38366 states have (on average 4.14325183756451) internal successors, (158960), 38366 states have internal predecessors, (158960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38367 states to 38367 states and 158960 transitions. [2021-04-15 04:45:19,790 INFO L78 Accepts]: Start accepts. Automaton has 38367 states and 158960 transitions. Word has length 39 [2021-04-15 04:45:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:19,790 INFO L480 AbstractCegarLoop]: Abstraction has 38367 states and 158960 transitions. [2021-04-15 04:45:19,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38367 states and 158960 transitions. [2021-04-15 04:45:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:19,866 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:19,867 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:20,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:20,067 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:20,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:20,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1311896975, now seen corresponding path program 52 times [2021-04-15 04:45:20,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:20,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304230679] [2021-04-15 04:45:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:20,650 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:45:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:20,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304230679] [2021-04-15 04:45:20,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823482808] [2021-04-15 04:45:20,762 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 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 [2021-04-15 04:45:20,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:45:20,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:20,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:21,098 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:21,099 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 28 treesize of output 16 [2021-04-15 04:45:21,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:21,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:21,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:21,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-04-15 04:45:21,201 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 35 treesize of output 27 [2021-04-15 04:45:21,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:21,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:21,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:21,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:45:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:21,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:21,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:21,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333137795] [2021-04-15 04:45:21,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:21,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:21,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:21,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:21,266 INFO L87 Difference]: Start difference. First operand 38367 states and 158960 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:24,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:24,470 INFO L93 Difference]: Finished difference Result 80709 states and 328280 transitions. [2021-04-15 04:45:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:45:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:24,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:24,699 INFO L225 Difference]: With dead ends: 80709 [2021-04-15 04:45:24,699 INFO L226 Difference]: Without dead ends: 80493 [2021-04-15 04:45:24,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2077.2ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:45:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80493 states. [2021-04-15 04:45:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80493 to 38109. [2021-04-15 04:45:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38109 states, 38108 states have (on average 4.145533746195024) internal successors, (157978), 38108 states have internal predecessors, (157978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38109 states to 38109 states and 157978 transitions. [2021-04-15 04:45:25,945 INFO L78 Accepts]: Start accepts. Automaton has 38109 states and 157978 transitions. Word has length 39 [2021-04-15 04:45:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:25,946 INFO L480 AbstractCegarLoop]: Abstraction has 38109 states and 157978 transitions. [2021-04-15 04:45:25,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 38109 states and 157978 transitions. [2021-04-15 04:45:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:26,018 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:26,018 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:26,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:26,218 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1573156905, now seen corresponding path program 53 times [2021-04-15 04:45:26,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:26,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346971372] [2021-04-15 04:45:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:26,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346971372] [2021-04-15 04:45:26,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367215776] [2021-04-15 04:45:26,575 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 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 [2021-04-15 04:45:26,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:45:26,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:26,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:26,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:26,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-04-15 04:45:26,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:26,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:26,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:26,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-04-15 04:45:26,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:26,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:26,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:26,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-04-15 04:45:26,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:45:26,992 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-04-15 04:45:26,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:26,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-04-15 04:45:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:45:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-04-15 04:45:27,152 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:45:27,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:27,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:27,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-04-15 04:45:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:27,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:27,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:45:27,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119157026] [2021-04-15 04:45:27,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:45:27,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:27,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:45:27,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:45:27,185 INFO L87 Difference]: Start difference. First operand 38109 states and 157978 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:28,553 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 04:45:31,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:31,233 INFO L93 Difference]: Finished difference Result 67305 states and 274805 transitions. [2021-04-15 04:45:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:45:31,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:31,435 INFO L225 Difference]: With dead ends: 67305 [2021-04-15 04:45:31,435 INFO L226 Difference]: Without dead ends: 67250 [2021-04-15 04:45:31,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2503.8ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:45:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67250 states. [2021-04-15 04:45:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67250 to 38670. [2021-04-15 04:45:32,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38670 states, 38669 states have (on average 4.149861646279966) internal successors, (160471), 38669 states have internal predecessors, (160471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38670 states to 38670 states and 160471 transitions. [2021-04-15 04:45:32,531 INFO L78 Accepts]: Start accepts. Automaton has 38670 states and 160471 transitions. Word has length 39 [2021-04-15 04:45:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:32,531 INFO L480 AbstractCegarLoop]: Abstraction has 38670 states and 160471 transitions. [2021-04-15 04:45:32,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 38670 states and 160471 transitions. [2021-04-15 04:45:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:32,604 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:32,604 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:32,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 04:45:32,819 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1254976421, now seen corresponding path program 54 times [2021-04-15 04:45:32,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:32,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878625351] [2021-04-15 04:45:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:33,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878625351] [2021-04-15 04:45:33,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186110277] [2021-04-15 04:45:33,517 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 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 [2021-04-15 04:45:33,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:45:33,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 04:45:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:33,976 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 35 treesize of output 27 [2021-04-15 04:45:33,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:33,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:33,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:45:33,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-04-15 04:45:34,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:34,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:45:34,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-04-15 04:45:34,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:34,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:34,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:34,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-04-15 04:45:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:34,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:34,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:34,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862199156] [2021-04-15 04:45:34,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:34,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:34,183 INFO L87 Difference]: Start difference. First operand 38670 states and 160471 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:37,361 INFO L93 Difference]: Finished difference Result 93986 states and 383473 transitions. [2021-04-15 04:45:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:45:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:37,645 INFO L225 Difference]: With dead ends: 93986 [2021-04-15 04:45:37,646 INFO L226 Difference]: Without dead ends: 93931 [2021-04-15 04:45:37,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2075.6ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:45:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93931 states. [2021-04-15 04:45:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93931 to 38539. [2021-04-15 04:45:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38539 states, 38538 states have (on average 4.146868026363589) internal successors, (159812), 38538 states have internal predecessors, (159812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159812 transitions. [2021-04-15 04:45:38,960 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159812 transitions. Word has length 39 [2021-04-15 04:45:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:38,960 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159812 transitions. [2021-04-15 04:45:38,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159812 transitions. [2021-04-15 04:45:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:39,036 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:39,036 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:39,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:39,237 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash 935568875, now seen corresponding path program 55 times [2021-04-15 04:45:39,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:39,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578067443] [2021-04-15 04:45:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:39,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578067443] [2021-04-15 04:45:39,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120242763] [2021-04-15 04:45:39,624 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 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 [2021-04-15 04:45:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:39,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:39,959 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 37 treesize of output 29 [2021-04-15 04:45:39,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:39,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:39,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:39,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:45:40,067 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:40,067 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 39 treesize of output 27 [2021-04-15 04:45:40,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:40,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:40,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:40,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:45:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:40,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:40,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:45:40,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159724232] [2021-04-15 04:45:40,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:45:40,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:40,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:45:40,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:45:40,134 INFO L87 Difference]: Start difference. First operand 38539 states and 159812 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:42,839 INFO L93 Difference]: Finished difference Result 88125 states and 363578 transitions. [2021-04-15 04:45:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:45:42,840 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:43,105 INFO L225 Difference]: With dead ends: 88125 [2021-04-15 04:45:43,106 INFO L226 Difference]: Without dead ends: 88070 [2021-04-15 04:45:43,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1263.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:45:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88070 states. [2021-04-15 04:45:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88070 to 39031. [2021-04-15 04:45:44,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39031 states, 39030 states have (on average 4.149321035101204) internal successors, (161948), 39030 states have internal predecessors, (161948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39031 states to 39031 states and 161948 transitions. [2021-04-15 04:45:44,740 INFO L78 Accepts]: Start accepts. Automaton has 39031 states and 161948 transitions. Word has length 39 [2021-04-15 04:45:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:44,741 INFO L480 AbstractCegarLoop]: Abstraction has 39031 states and 161948 transitions. [2021-04-15 04:45:44,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 39031 states and 161948 transitions. [2021-04-15 04:45:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:44,832 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:44,832 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:45,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-04-15 04:45:45,033 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1940405397, now seen corresponding path program 56 times [2021-04-15 04:45:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:45,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272360747] [2021-04-15 04:45:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:45,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272360747] [2021-04-15 04:45:45,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393636135] [2021-04-15 04:45:45,558 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 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 [2021-04-15 04:45:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:45:45,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:45,908 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 37 treesize of output 29 [2021-04-15 04:45:45,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:45,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:45,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:45,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:45:46,039 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:46,039 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 39 treesize of output 27 [2021-04-15 04:45:46,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:46,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:46,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:46,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:45:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:46,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:46,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:45:46,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394383741] [2021-04-15 04:45:46,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:45:46,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:45:46,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:45:46,102 INFO L87 Difference]: Start difference. First operand 39031 states and 161948 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:48,906 INFO L93 Difference]: Finished difference Result 85381 states and 351989 transitions. [2021-04-15 04:45:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:45:48,908 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:49,170 INFO L225 Difference]: With dead ends: 85381 [2021-04-15 04:45:49,171 INFO L226 Difference]: Without dead ends: 85326 [2021-04-15 04:45:49,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1428.7ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 04:45:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85326 states. [2021-04-15 04:45:50,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85326 to 38439. [2021-04-15 04:45:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38439 states, 38438 states have (on average 4.146209480201883) internal successors, (159372), 38438 states have internal predecessors, (159372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38439 states to 38439 states and 159372 transitions. [2021-04-15 04:45:50,430 INFO L78 Accepts]: Start accepts. Automaton has 38439 states and 159372 transitions. Word has length 39 [2021-04-15 04:45:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:50,430 INFO L480 AbstractCegarLoop]: Abstraction has 38439 states and 159372 transitions. [2021-04-15 04:45:50,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38439 states and 159372 transitions. [2021-04-15 04:45:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:50,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:50,517 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:50,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 04:45:50,725 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -463391085, now seen corresponding path program 57 times [2021-04-15 04:45:50,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:50,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170741675] [2021-04-15 04:45:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170741675] [2021-04-15 04:45:51,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987189583] [2021-04-15 04:45:51,246 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 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 [2021-04-15 04:45:51,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:45:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-04-15 04:45:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:51,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:51,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-04-15 04:45:51,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:51,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:112 [2021-04-15 04:45:51,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:51,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-04-15 04:45:51,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:51,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:54 [2021-04-15 04:45:52,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:52,039 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 3 [2021-04-15 04:45:52,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:52,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:45:52,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:52,108 INFO L628 ElimStorePlain]: treesize reduction 25, result has 57.6 percent of original size [2021-04-15 04:45:52,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:52,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:97, output treesize:34 [2021-04-15 04:45:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:52,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:52,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-04-15 04:45:52,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386069017] [2021-04-15 04:45:52,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:45:52,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:45:52,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:45:52,365 INFO L87 Difference]: Start difference. First operand 38439 states and 159372 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:54,939 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-04-15 04:45:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:57,176 INFO L93 Difference]: Finished difference Result 63331 states and 257800 transitions. [2021-04-15 04:45:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:45:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:45:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:57,369 INFO L225 Difference]: With dead ends: 63331 [2021-04-15 04:45:57,369 INFO L226 Difference]: Without dead ends: 63183 [2021-04-15 04:45:57,369 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 3348.5ms TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 04:45:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63183 states. [2021-04-15 04:45:58,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63183 to 38679. [2021-04-15 04:45:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38679 states, 38678 states have (on average 4.143492424634159) internal successors, (160262), 38678 states have internal predecessors, (160262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:58,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38679 states to 38679 states and 160262 transitions. [2021-04-15 04:45:58,525 INFO L78 Accepts]: Start accepts. Automaton has 38679 states and 160262 transitions. Word has length 39 [2021-04-15 04:45:58,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:58,525 INFO L480 AbstractCegarLoop]: Abstraction has 38679 states and 160262 transitions. [2021-04-15 04:45:58,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:45:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 38679 states and 160262 transitions. [2021-04-15 04:45:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:58,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:58,603 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:45:58,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 04:45:58,805 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2145227995, now seen corresponding path program 58 times [2021-04-15 04:45:58,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:58,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920121634] [2021-04-15 04:45:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:59,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920121634] [2021-04-15 04:45:59,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456572425] [2021-04-15 04:45:59,345 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 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 [2021-04-15 04:45:59,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:45:59,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:59,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:59,711 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:59,711 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 33 treesize of output 21 [2021-04-15 04:45:59,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:59,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:59,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:59,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:45:59,773 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 35 treesize of output 27 [2021-04-15 04:45:59,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:59,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:59,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:59,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:45:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:45:59,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:59,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:59,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068765599] [2021-04-15 04:45:59,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:59,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:59,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:59,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:59,847 INFO L87 Difference]: Start difference. First operand 38679 states and 160262 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:03,405 INFO L93 Difference]: Finished difference Result 81718 states and 332147 transitions. [2021-04-15 04:46:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:46:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:46:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:03,663 INFO L225 Difference]: With dead ends: 81718 [2021-04-15 04:46:03,663 INFO L226 Difference]: Without dead ends: 81494 [2021-04-15 04:46:03,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1986.8ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:46:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81494 states. [2021-04-15 04:46:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81494 to 38631. [2021-04-15 04:46:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38631 states, 38630 states have (on average 4.143981361636034) internal successors, (160082), 38630 states have internal predecessors, (160082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38631 states to 38631 states and 160082 transitions. [2021-04-15 04:46:04,941 INFO L78 Accepts]: Start accepts. Automaton has 38631 states and 160082 transitions. Word has length 39 [2021-04-15 04:46:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:04,941 INFO L480 AbstractCegarLoop]: Abstraction has 38631 states and 160082 transitions. [2021-04-15 04:46:04,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38631 states and 160082 transitions. [2021-04-15 04:46:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:05,020 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:05,020 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:46:05,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:05,220 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:05,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:05,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1553694967, now seen corresponding path program 59 times [2021-04-15 04:46:05,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:05,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524586948] [2021-04-15 04:46:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:05,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524586948] [2021-04-15 04:46:05,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388079780] [2021-04-15 04:46:05,777 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 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 [2021-04-15 04:46:05,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:46:05,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:46:05,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 57 [2021-04-15 04:46:06,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:06,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:06,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:46:06,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:98 [2021-04-15 04:46:06,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:06,867 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 41 treesize of output 59 [2021-04-15 04:46:06,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:46:06,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:06,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:06,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-04-15 04:46:06,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:06,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:06,895 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 16 treesize of output 10 [2021-04-15 04:46:06,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:07,028 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-04-15 04:46:07,028 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-04-15 04:46:07,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-04-15 04:46:07,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-04-15 04:46:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:07,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:07,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-04-15 04:46:07,291 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:07,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:07,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:07,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:46:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:07,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:07,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:46:07,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765604375] [2021-04-15 04:46:07,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:46:07,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:07,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:46:07,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:46:07,410 INFO L87 Difference]: Start difference. First operand 38631 states and 160082 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:09,900 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 04:46:11,967 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:46:12,217 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-04-15 04:46:13,614 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-04-15 04:46:14,281 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-04-15 04:46:17,949 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-04-15 04:46:20,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:20,356 INFO L93 Difference]: Finished difference Result 93198 states and 377973 transitions. [2021-04-15 04:46:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-04-15 04:46:20,358 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:46:20,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:20,668 INFO L225 Difference]: With dead ends: 93198 [2021-04-15 04:46:20,668 INFO L226 Difference]: Without dead ends: 92715 [2021-04-15 04:46:20,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 7404.0ms TimeCoverageRelationStatistics Valid=1346, Invalid=7774, Unknown=0, NotChecked=0, Total=9120 [2021-04-15 04:46:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92715 states. [2021-04-15 04:46:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92715 to 38799. [2021-04-15 04:46:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38799 states, 38798 states have (on average 4.143048610753132) internal successors, (160742), 38798 states have internal predecessors, (160742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38799 states to 38799 states and 160742 transitions. [2021-04-15 04:46:22,056 INFO L78 Accepts]: Start accepts. Automaton has 38799 states and 160742 transitions. Word has length 39 [2021-04-15 04:46:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:22,056 INFO L480 AbstractCegarLoop]: Abstraction has 38799 states and 160742 transitions. [2021-04-15 04:46:22,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 38799 states and 160742 transitions. [2021-04-15 04:46:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:22,143 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:22,143 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:46:22,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:22,344 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:22,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:22,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1757615713, now seen corresponding path program 60 times [2021-04-15 04:46:22,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:22,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693626367] [2021-04-15 04:46:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:23,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693626367] [2021-04-15 04:46:23,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919148806] [2021-04-15 04:46:23,083 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 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 [2021-04-15 04:46:23,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:46:23,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 04:46:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-04-15 04:46:23,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:23,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:23,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:23,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-04-15 04:46:23,711 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:23,711 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 41 treesize of output 29 [2021-04-15 04:46:23,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:23,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:23,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:23,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-04-15 04:46:23,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:23,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-04-15 04:46:23,786 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:46:23,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:23,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:23,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-04-15 04:46:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:23,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:23,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:23,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933337218] [2021-04-15 04:46:23,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:23,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:23,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:23,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:23,858 INFO L87 Difference]: Start difference. First operand 38799 states and 160742 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:24,802 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 04:46:27,276 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-04-15 04:46:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:28,803 INFO L93 Difference]: Finished difference Result 67047 states and 273559 transitions. [2021-04-15 04:46:28,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:46:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:46:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:29,018 INFO L225 Difference]: With dead ends: 67047 [2021-04-15 04:46:29,018 INFO L226 Difference]: Without dead ends: 66957 [2021-04-15 04:46:29,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2879.8ms TimeCoverageRelationStatistics Valid=382, Invalid=1780, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:46:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66957 states. [2021-04-15 04:46:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66957 to 38963. [2021-04-15 04:46:30,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38963 states, 38962 states have (on average 4.142395154252862) internal successors, (161396), 38962 states have internal predecessors, (161396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38963 states to 38963 states and 161396 transitions. [2021-04-15 04:46:30,215 INFO L78 Accepts]: Start accepts. Automaton has 38963 states and 161396 transitions. Word has length 39 [2021-04-15 04:46:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:30,215 INFO L480 AbstractCegarLoop]: Abstraction has 38963 states and 161396 transitions. [2021-04-15 04:46:30,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 38963 states and 161396 transitions. [2021-04-15 04:46:30,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:30,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:30,305 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:46:30,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:30,505 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:30,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash 159853789, now seen corresponding path program 61 times [2021-04-15 04:46:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:30,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314135419] [2021-04-15 04:46:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314135419] [2021-04-15 04:46:31,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837738439] [2021-04-15 04:46:31,214 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 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 [2021-04-15 04:46:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:46:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:31,928 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 37 treesize of output 29 [2021-04-15 04:46:31,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:31,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:31,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:31,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:46:32,012 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:32,012 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 39 treesize of output 27 [2021-04-15 04:46:32,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:32,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:32,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:32,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:46:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:32,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:32,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:32,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858357676] [2021-04-15 04:46:32,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:32,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:32,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:32,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:32,118 INFO L87 Difference]: Start difference. First operand 38963 states and 161396 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:36,773 INFO L93 Difference]: Finished difference Result 99416 states and 403744 transitions. [2021-04-15 04:46:36,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:46:36,774 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:46:36,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:37,157 INFO L225 Difference]: With dead ends: 99416 [2021-04-15 04:46:37,158 INFO L226 Difference]: Without dead ends: 99280 [2021-04-15 04:46:37,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2639.7ms TimeCoverageRelationStatistics Valid=446, Invalid=2004, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:46:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99280 states. [2021-04-15 04:46:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99280 to 38539. [2021-04-15 04:46:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38539 states, 38538 states have (on average 4.1451554310031655) internal successors, (159746), 38538 states have internal predecessors, (159746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159746 transitions. [2021-04-15 04:46:38,741 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159746 transitions. Word has length 39 [2021-04-15 04:46:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:38,741 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159746 transitions. [2021-04-15 04:46:38,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159746 transitions. [2021-04-15 04:46:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:38,823 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:38,823 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:46:39,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:39,023 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:39,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1095343571, now seen corresponding path program 62 times [2021-04-15 04:46:39,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:39,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727400423] [2021-04-15 04:46:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:39,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727400423] [2021-04-15 04:46:39,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554607526] [2021-04-15 04:46:39,849 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 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 [2021-04-15 04:46:39,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:46:39,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:46:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:40,336 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:40,336 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 33 treesize of output 21 [2021-04-15 04:46:40,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:46:40,500 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 35 treesize of output 27 [2021-04-15 04:46:40,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:46:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:40,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:40,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860921905] [2021-04-15 04:46:40,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:40,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:40,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:40,614 INFO L87 Difference]: Start difference. First operand 38539 states and 159746 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:44,200 INFO L93 Difference]: Finished difference Result 66725 states and 273315 transitions. [2021-04-15 04:46:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:46:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:46:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:44,415 INFO L225 Difference]: With dead ends: 66725 [2021-04-15 04:46:44,416 INFO L226 Difference]: Without dead ends: 66533 [2021-04-15 04:46:44,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2873.7ms TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:46:44,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66533 states. [2021-04-15 04:46:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66533 to 38563. [2021-04-15 04:46:45,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38563 states, 38562 states have (on average 4.144753902805871) internal successors, (159830), 38562 states have internal predecessors, (159830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38563 states to 38563 states and 159830 transitions. [2021-04-15 04:46:45,706 INFO L78 Accepts]: Start accepts. Automaton has 38563 states and 159830 transitions. Word has length 39 [2021-04-15 04:46:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:45,706 INFO L480 AbstractCegarLoop]: Abstraction has 38563 states and 159830 transitions. [2021-04-15 04:46:45,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 38563 states and 159830 transitions. [2021-04-15 04:46:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:45,803 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:45,803 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:46:46,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-04-15 04:46:46,003 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:46,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1049841687, now seen corresponding path program 63 times [2021-04-15 04:46:46,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:46,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192899641] [2021-04-15 04:46:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:46,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192899641] [2021-04-15 04:46:46,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396406431] [2021-04-15 04:46:46,729 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 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 [2021-04-15 04:46:46,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:46:46,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:46,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 04:46:46,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:47,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:47,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 41 [2021-04-15 04:46:47,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:47,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:47,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:46:47,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:63 [2021-04-15 04:46:48,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,084 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 37 treesize of output 53 [2021-04-15 04:46:48,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:112 [2021-04-15 04:46:48,317 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-04-15 04:46:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:48,598 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-04-15 04:46:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-04-15 04:46:48,601 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:48,609 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 3 [2021-04-15 04:46:48,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,631 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 16 [2021-04-15 04:46:48,635 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:48,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:48,676 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-04-15 04:46:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-04-15 04:46:48,680 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:46:48,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,703 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 16 [2021-04-15 04:46:48,706 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:48,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:48,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:48,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:48,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2021-04-15 04:46:48,720 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,739 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 16 [2021-04-15 04:46:48,742 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:48,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:48,764 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-04-15 04:46:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 1 [2021-04-15 04:46:48,766 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:48,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,790 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-04-15 04:46:48,794 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-04-15 04:46:49,121 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-04-15 04:46:49,122 INFO L628 ElimStorePlain]: treesize reduction 117, result has 51.5 percent of original size [2021-04-15 04:46:49,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-04-15 04:46:49,134 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:363, output treesize:128 [2021-04-15 04:46:49,308 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-04-15 04:46:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:46:49,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:49,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:46:49,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365593419] [2021-04-15 04:46:49,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:46:49,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:49,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:46:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:46:49,547 INFO L87 Difference]: Start difference. First operand 38563 states and 159830 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:46:50,628 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-04-15 04:46:51,104 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-04-15 04:46:51,492 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-04-15 04:46:52,086 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-04-15 04:46:52,332 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-04-15 04:46:53,607 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-04-15 04:46:53,880 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:46:54,097 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-04-15 04:46:54,543 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-04-15 04:46:54,768 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-04-15 04:46:55,119 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-04-15 04:46:55,876 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-04-15 04:46:56,312 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-04-15 04:46:56,609 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-04-15 04:46:57,021 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-04-15 04:46:57,333 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-04-15 04:46:57,876 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-04-15 04:46:58,301 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-04-15 04:46:58,615 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-04-15 04:46:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:59,338 INFO L93 Difference]: Finished difference Result 69019 states and 280817 transitions. [2021-04-15 04:46:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:46:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:46:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:59,538 INFO L225 Difference]: With dead ends: 69019 [2021-04-15 04:46:59,539 INFO L226 Difference]: Without dead ends: 68871 [2021-04-15 04:46:59,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 8044.4ms TimeCoverageRelationStatistics Valid=940, Invalid=4912, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 04:46:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68871 states. [2021-04-15 04:47:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68871 to 38767. [2021-04-15 04:47:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38767 states, 38766 states have (on average 4.142805551256256) internal successors, (160600), 38766 states have internal predecessors, (160600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38767 states to 38767 states and 160600 transitions. [2021-04-15 04:47:00,685 INFO L78 Accepts]: Start accepts. Automaton has 38767 states and 160600 transitions. Word has length 39 [2021-04-15 04:47:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:00,686 INFO L480 AbstractCegarLoop]: Abstraction has 38767 states and 160600 transitions. [2021-04-15 04:47:00,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 38767 states and 160600 transitions. [2021-04-15 04:47:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:00,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:00,766 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:00,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 04:47:00,969 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:00,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1563288699, now seen corresponding path program 64 times [2021-04-15 04:47:00,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:00,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291671818] [2021-04-15 04:47:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:01,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291671818] [2021-04-15 04:47:01,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709195886] [2021-04-15 04:47:01,702 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 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 [2021-04-15 04:47:01,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:47:01,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:01,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:02,195 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:02,195 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 33 treesize of output 21 [2021-04-15 04:47:02,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:02,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:02,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:02,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:47:02,278 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 35 treesize of output 27 [2021-04-15 04:47:02,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:02,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:02,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:02,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:47:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:02,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:02,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:47:02,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767901245] [2021-04-15 04:47:02,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:47:02,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:47:02,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:47:02,376 INFO L87 Difference]: Start difference. First operand 38767 states and 160600 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:03,372 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 04:47:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:06,305 INFO L93 Difference]: Finished difference Result 81937 states and 333038 transitions. [2021-04-15 04:47:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:47:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:47:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:06,563 INFO L225 Difference]: With dead ends: 81937 [2021-04-15 04:47:06,563 INFO L226 Difference]: Without dead ends: 81713 [2021-04-15 04:47:06,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2679.1ms TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:47:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81713 states. [2021-04-15 04:47:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81713 to 38719. [2021-04-15 04:47:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38719 states, 38718 states have (on average 4.143292525440364) internal successors, (160420), 38718 states have internal predecessors, (160420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38719 states to 38719 states and 160420 transitions. [2021-04-15 04:47:07,905 INFO L78 Accepts]: Start accepts. Automaton has 38719 states and 160420 transitions. Word has length 39 [2021-04-15 04:47:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:07,905 INFO L480 AbstractCegarLoop]: Abstraction has 38719 states and 160420 transitions. [2021-04-15 04:47:07,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 38719 states and 160420 transitions. [2021-04-15 04:47:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:07,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:07,984 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:08,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-04-15 04:47:08,186 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1373542401, now seen corresponding path program 65 times [2021-04-15 04:47:08,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:08,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582515410] [2021-04-15 04:47:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:08,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582515410] [2021-04-15 04:47:08,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112260698] [2021-04-15 04:47:08,885 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 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 [2021-04-15 04:47:08,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:47:08,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:47:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:09,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:09,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:09,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 57 [2021-04-15 04:47:09,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:09,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:09,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:09,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:95 [2021-04-15 04:47:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:10,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-04-15 04:47:10,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:10,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,030 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 16 treesize of output 10 [2021-04-15 04:47:10,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:10,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:10,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-04-15 04:47:10,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:47:10,254 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-04-15 04:47:10,255 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-04-15 04:47:10,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-04-15 04:47:10,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-04-15 04:47:10,633 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:47:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:10,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:10,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-04-15 04:47:10,835 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:10,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:10,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:10,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:47:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:10,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:10,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:47:10,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467512204] [2021-04-15 04:47:10,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:47:10,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:10,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:47:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:47:10,974 INFO L87 Difference]: Start difference. First operand 38719 states and 160420 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:12,256 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 04:47:12,852 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-04-15 04:47:13,853 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-04-15 04:47:14,554 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 04:47:15,526 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-04-15 04:47:15,842 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-04-15 04:47:16,725 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-04-15 04:47:17,149 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-04-15 04:47:17,435 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:47:17,748 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-04-15 04:47:19,935 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-04-15 04:47:20,435 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-04-15 04:47:20,623 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 04:47:21,581 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-04-15 04:47:23,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:23,747 INFO L93 Difference]: Finished difference Result 93148 states and 377918 transitions. [2021-04-15 04:47:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-04-15 04:47:23,749 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:47:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:24,219 INFO L225 Difference]: With dead ends: 93148 [2021-04-15 04:47:24,219 INFO L226 Difference]: Without dead ends: 92681 [2021-04-15 04:47:24,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 8884.2ms TimeCoverageRelationStatistics Valid=1205, Invalid=6805, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:47:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92681 states. [2021-04-15 04:47:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92681 to 38859. [2021-04-15 04:47:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38859 states, 38858 states have (on average 4.142261567759535) internal successors, (160960), 38858 states have internal predecessors, (160960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38859 states to 38859 states and 160960 transitions. [2021-04-15 04:47:25,636 INFO L78 Accepts]: Start accepts. Automaton has 38859 states and 160960 transitions. Word has length 39 [2021-04-15 04:47:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:25,636 INFO L480 AbstractCegarLoop]: Abstraction has 38859 states and 160960 transitions. [2021-04-15 04:47:25,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38859 states and 160960 transitions. [2021-04-15 04:47:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:25,720 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:25,720 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:25,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-04-15 04:47:25,930 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1169621655, now seen corresponding path program 66 times [2021-04-15 04:47:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:25,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265216244] [2021-04-15 04:47:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:26,615 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:47:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265216244] [2021-04-15 04:47:26,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009999400] [2021-04-15 04:47:26,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:47:26,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:47:26,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:47:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:27,609 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 35 treesize of output 27 [2021-04-15 04:47:27,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:27,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:27,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:27,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-04-15 04:47:27,734 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:27,734 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 35 treesize of output 23 [2021-04-15 04:47:27,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:27,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:27,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:27,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:16 [2021-04-15 04:47:27,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:47:27,824 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 9 treesize of output 5 [2021-04-15 04:47:27,828 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:47:27,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:27,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:27,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-04-15 04:47:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:27,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:27,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:47:27,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108326804] [2021-04-15 04:47:27,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:47:27,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:47:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:47:27,909 INFO L87 Difference]: Start difference. First operand 38859 states and 160960 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:28,590 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:47:29,098 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 04:47:31,476 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-04-15 04:47:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:32,889 INFO L93 Difference]: Finished difference Result 66745 states and 272318 transitions. [2021-04-15 04:47:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:47:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:47:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:33,082 INFO L225 Difference]: With dead ends: 66745 [2021-04-15 04:47:33,083 INFO L226 Difference]: Without dead ends: 66655 [2021-04-15 04:47:33,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3105.3ms TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:47:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66655 states. [2021-04-15 04:47:34,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66655 to 39027. [2021-04-15 04:47:34,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39027 states, 39026 states have (on average 4.141341669656127) internal successors, (161620), 39026 states have internal predecessors, (161620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39027 states to 39027 states and 161620 transitions. [2021-04-15 04:47:34,291 INFO L78 Accepts]: Start accepts. Automaton has 39027 states and 161620 transitions. Word has length 39 [2021-04-15 04:47:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:34,291 INFO L480 AbstractCegarLoop]: Abstraction has 39027 states and 161620 transitions. [2021-04-15 04:47:34,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 39027 states and 161620 transitions. [2021-04-15 04:47:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:34,370 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:34,370 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:34,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-04-15 04:47:34,570 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1527583717, now seen corresponding path program 67 times [2021-04-15 04:47:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:34,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027444669] [2021-04-15 04:47:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:35,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027444669] [2021-04-15 04:47:35,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560758253] [2021-04-15 04:47:35,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:35,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:36,060 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 37 treesize of output 29 [2021-04-15 04:47:36,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:36,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:36,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:36,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:47:36,166 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:36,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-04-15 04:47:36,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:36,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:36,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:36,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:47:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:36,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:36,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:47:36,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995726625] [2021-04-15 04:47:36,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:47:36,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:36,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:47:36,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:47:36,316 INFO L87 Difference]: Start difference. First operand 39027 states and 161620 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:37,614 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-04-15 04:47:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:41,766 INFO L93 Difference]: Finished difference Result 99611 states and 404417 transitions. [2021-04-15 04:47:41,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:47:41,769 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:47:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:42,441 INFO L225 Difference]: With dead ends: 99611 [2021-04-15 04:47:42,441 INFO L226 Difference]: Without dead ends: 99475 [2021-04-15 04:47:42,442 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3300.9ms TimeCoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:47:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99475 states. [2021-04-15 04:47:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99475 to 38559. [2021-04-15 04:47:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38559 states, 38558 states have (on average 4.144820789460034) internal successors, (159816), 38558 states have internal predecessors, (159816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38559 states to 38559 states and 159816 transitions. [2021-04-15 04:47:44,034 INFO L78 Accepts]: Start accepts. Automaton has 38559 states and 159816 transitions. Word has length 39 [2021-04-15 04:47:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:44,034 INFO L480 AbstractCegarLoop]: Abstraction has 38559 states and 159816 transitions. [2021-04-15 04:47:44,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 38559 states and 159816 transitions. [2021-04-15 04:47:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:44,123 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:44,124 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:44,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-04-15 04:47:44,324 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:44,325 INFO L82 PathProgramCache]: Analyzing trace with hash -912086607, now seen corresponding path program 68 times [2021-04-15 04:47:44,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:44,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794500426] [2021-04-15 04:47:44,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:44,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794500426] [2021-04-15 04:47:44,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726742273] [2021-04-15 04:47:44,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:45,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:47:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:45,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:47:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:45,590 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:45,591 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 28 treesize of output 16 [2021-04-15 04:47:45,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:45,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:45,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:45,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:47:45,711 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 30 treesize of output 22 [2021-04-15 04:47:45,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:45,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:45,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:45,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:47:45,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:45,922 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 16 [2021-04-15 04:47:45,928 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:45,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:45,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:45,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:47:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:46,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:46,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:47:46,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091574210] [2021-04-15 04:47:46,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:47:46,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:46,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:47:46,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:47:46,101 INFO L87 Difference]: Start difference. First operand 38559 states and 159816 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:47,541 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-04-15 04:47:48,010 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 04:47:48,604 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-04-15 04:47:48,955 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-04-15 04:47:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:52,190 INFO L93 Difference]: Finished difference Result 85936 states and 353751 transitions. [2021-04-15 04:47:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:47:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:47:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:52,488 INFO L225 Difference]: With dead ends: 85936 [2021-04-15 04:47:52,489 INFO L226 Difference]: Without dead ends: 85881 [2021-04-15 04:47:52,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 3590.6ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:47:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85881 states. [2021-04-15 04:47:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85881 to 39379. [2021-04-15 04:47:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39379 states, 39378 states have (on average 4.140992432322617) internal successors, (163064), 39378 states have internal predecessors, (163064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:53,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39379 states to 39379 states and 163064 transitions. [2021-04-15 04:47:53,963 INFO L78 Accepts]: Start accepts. Automaton has 39379 states and 163064 transitions. Word has length 39 [2021-04-15 04:47:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:53,964 INFO L480 AbstractCegarLoop]: Abstraction has 39379 states and 163064 transitions. [2021-04-15 04:47:53,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 39379 states and 163064 transitions. [2021-04-15 04:47:54,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:54,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:54,058 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:47:54,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:54,274 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash -659404043, now seen corresponding path program 69 times [2021-04-15 04:47:54,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:54,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970740624] [2021-04-15 04:47:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:55,237 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 04:47:55,408 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:47:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:55,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970740624] [2021-04-15 04:47:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303768047] [2021-04-15 04:47:55,702 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 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 [2021-04-15 04:47:55,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:47:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:47:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:56,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:56,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:56,406 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 30 treesize of output 36 [2021-04-15 04:47:56,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:56,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:56,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:56,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:93 [2021-04-15 04:47:56,837 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 35 treesize of output 27 [2021-04-15 04:47:56,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:56,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:56,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:56,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:47:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:47:57,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:57,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:47:57,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471190219] [2021-04-15 04:47:57,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:47:57,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:47:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:47:57,014 INFO L87 Difference]: Start difference. First operand 39379 states and 163064 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:47:58,410 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-04-15 04:47:59,030 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:47:59,902 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-04-15 04:48:00,711 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-04-15 04:48:01,174 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-04-15 04:48:01,652 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-04-15 04:48:02,303 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-04-15 04:48:02,877 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 04:48:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:04,415 INFO L93 Difference]: Finished difference Result 84759 states and 343708 transitions. [2021-04-15 04:48:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 04:48:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:48:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:04,719 INFO L225 Difference]: With dead ends: 84759 [2021-04-15 04:48:04,719 INFO L226 Difference]: Without dead ends: 84511 [2021-04-15 04:48:04,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 6179.8ms TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:48:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84511 states. [2021-04-15 04:48:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84511 to 39565. [2021-04-15 04:48:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39565 states, 39564 states have (on average 4.139975735517137) internal successors, (163794), 39564 states have internal predecessors, (163794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39565 states to 39565 states and 163794 transitions. [2021-04-15 04:48:06,091 INFO L78 Accepts]: Start accepts. Automaton has 39565 states and 163794 transitions. Word has length 39 [2021-04-15 04:48:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:06,091 INFO L480 AbstractCegarLoop]: Abstraction has 39565 states and 163794 transitions. [2021-04-15 04:48:06,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 39565 states and 163794 transitions. [2021-04-15 04:48:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:06,173 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:06,173 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:48:06,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-04-15 04:48:06,388 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:06,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2069317459, now seen corresponding path program 70 times [2021-04-15 04:48:06,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:06,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643408779] [2021-04-15 04:48:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:07,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643408779] [2021-04-15 04:48:07,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706203479] [2021-04-15 04:48:07,092 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 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 [2021-04-15 04:48:07,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:07,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:48:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:07,690 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 37 treesize of output 29 [2021-04-15 04:48:07,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:07,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:07,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:07,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:48:07,780 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:48:07,780 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 34 treesize of output 22 [2021-04-15 04:48:07,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:07,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:07,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:07,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-04-15 04:48:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:07,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:07,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:48:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48701700] [2021-04-15 04:48:07,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:48:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:48:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:48:07,947 INFO L87 Difference]: Start difference. First operand 39565 states and 163794 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:10,431 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-04-15 04:48:10,760 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 04:48:13,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:13,604 INFO L93 Difference]: Finished difference Result 80823 states and 332842 transitions. [2021-04-15 04:48:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:48:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:48:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:13,879 INFO L225 Difference]: With dead ends: 80823 [2021-04-15 04:48:13,879 INFO L226 Difference]: Without dead ends: 80768 [2021-04-15 04:48:13,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2560.2ms TimeCoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 04:48:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80768 states. [2021-04-15 04:48:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80768 to 40133. [2021-04-15 04:48:15,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40133 states, 40132 states have (on average 4.142778829861458) internal successors, (166258), 40132 states have internal predecessors, (166258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40133 states to 40133 states and 166258 transitions. [2021-04-15 04:48:15,270 INFO L78 Accepts]: Start accepts. Automaton has 40133 states and 166258 transitions. Word has length 39 [2021-04-15 04:48:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:15,271 INFO L480 AbstractCegarLoop]: Abstraction has 40133 states and 166258 transitions. [2021-04-15 04:48:15,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 40133 states and 166258 transitions. [2021-04-15 04:48:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:15,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:15,358 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:48:15,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:15,559 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1588061807, now seen corresponding path program 71 times [2021-04-15 04:48:15,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:15,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084000099] [2021-04-15 04:48:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:15,971 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-04-15 04:48:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084000099] [2021-04-15 04:48:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679939067] [2021-04-15 04:48:16,584 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 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 [2021-04-15 04:48:16,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:48:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:16,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 04:48:16,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:17,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:17,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-04-15 04:48:17,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:17,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:17,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:17,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:72 [2021-04-15 04:48:18,065 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:48:19,423 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-04-15 04:48:19,657 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_32, v_prenex_30, v_prenex_34], 3=[q1]} [2021-04-15 04:48:19,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:19,684 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 22 treesize of output 24 [2021-04-15 04:48:19,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:48:19,886 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-04-15 04:48:19,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:19,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:19,914 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 22 treesize of output 24 [2021-04-15 04:48:19,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 04:48:20,146 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-04-15 04:48:20,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:20,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:20,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-04-15 04:48:20,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:48:20,404 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-04-15 04:48:20,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:20,481 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:20,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 51 [2021-04-15 04:48:20,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:20,734 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-04-15 04:48:20,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:20,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 11 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-04-15 04:48:20,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 15 variables, input treesize:216, output treesize:104 [2021-04-15 04:48:21,036 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:48:21,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:21,466 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 9 treesize of output 5 [2021-04-15 04:48:21,472 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:48:21,564 INFO L628 ElimStorePlain]: treesize reduction 14, result has 68.9 percent of original size [2021-04-15 04:48:21,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:48:21,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:21 [2021-04-15 04:48:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:21,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:21,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:48:21,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977398238] [2021-04-15 04:48:21,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:48:21,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:48:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:48:21,736 INFO L87 Difference]: Start difference. First operand 40133 states and 166258 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:22,043 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:48:22,265 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:48:22,922 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-04-15 04:48:23,469 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-04-15 04:48:23,946 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-04-15 04:48:24,478 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-04-15 04:48:25,025 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-04-15 04:48:25,624 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-04-15 04:48:26,096 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-04-15 04:48:26,956 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-04-15 04:48:27,486 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-04-15 04:48:27,842 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2021-04-15 04:48:28,068 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-04-15 04:48:28,614 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 04:48:29,056 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 04:48:29,496 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-04-15 04:48:29,757 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-04-15 04:48:30,782 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-04-15 04:48:31,276 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-04-15 04:48:31,743 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-04-15 04:48:32,426 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2021-04-15 04:48:34,074 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2021-04-15 04:48:34,656 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-04-15 04:48:35,386 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2021-04-15 04:48:35,648 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-04-15 04:48:36,188 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 04:48:36,621 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-04-15 04:48:36,856 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 04:48:37,336 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-04-15 04:48:38,556 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-04-15 04:48:38,880 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 04:48:39,336 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-04-15 04:48:39,618 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 04:48:40,172 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-04-15 04:48:40,771 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-04-15 04:48:41,652 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-04-15 04:48:42,542 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-04-15 04:48:43,213 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-04-15 04:48:43,896 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-04-15 04:48:44,571 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-04-15 04:48:45,343 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-04-15 04:48:46,139 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-04-15 04:48:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:46,650 INFO L93 Difference]: Finished difference Result 90147 states and 367709 transitions. [2021-04-15 04:48:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 04:48:46,653 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:48:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:47,103 INFO L225 Difference]: With dead ends: 90147 [2021-04-15 04:48:47,103 INFO L226 Difference]: Without dead ends: 90014 [2021-04-15 04:48:47,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 19826.3ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:48:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90014 states. [2021-04-15 04:48:48,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90014 to 41032. [2021-04-15 04:48:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41032 states, 41031 states have (on average 4.142672613389876) internal successors, (169978), 41031 states have internal predecessors, (169978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41032 states to 41032 states and 169978 transitions. [2021-04-15 04:48:48,639 INFO L78 Accepts]: Start accepts. Automaton has 41032 states and 169978 transitions. Word has length 39 [2021-04-15 04:48:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:48,639 INFO L480 AbstractCegarLoop]: Abstraction has 41032 states and 169978 transitions. [2021-04-15 04:48:48,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 41032 states and 169978 transitions. [2021-04-15 04:48:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:48,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:48,721 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:48:48,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-04-15 04:48:48,936 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1287912465, now seen corresponding path program 72 times [2021-04-15 04:48:48,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371834424] [2021-04-15 04:48:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:49,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371834424] [2021-04-15 04:48:49,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095264176] [2021-04-15 04:48:49,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:49,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:48:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:48:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:50,551 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 37 treesize of output 29 [2021-04-15 04:48:50,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:50,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:50,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:50,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:48:50,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:48:50,847 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 39 treesize of output 27 [2021-04-15 04:48:50,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:50,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:50,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:50,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:48:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:48:51,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:51,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:48:51,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977881819] [2021-04-15 04:48:51,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:48:51,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:48:51,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:48:51,008 INFO L87 Difference]: Start difference. First operand 41032 states and 169978 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:48:53,360 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:48:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:58,466 INFO L93 Difference]: Finished difference Result 88681 states and 365549 transitions. [2021-04-15 04:48:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:48:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:48:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:58,780 INFO L225 Difference]: With dead ends: 88681 [2021-04-15 04:48:58,780 INFO L226 Difference]: Without dead ends: 88626 [2021-04-15 04:48:58,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3276.0ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 04:48:58,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88626 states. [2021-04-15 04:49:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88626 to 41169. [2021-04-15 04:49:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41169 states, 41168 states have (on average 4.146060046638166) internal successors, (170685), 41168 states have internal predecessors, (170685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41169 states to 41169 states and 170685 transitions. [2021-04-15 04:49:00,305 INFO L78 Accepts]: Start accepts. Automaton has 41169 states and 170685 transitions. Word has length 39 [2021-04-15 04:49:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:00,305 INFO L480 AbstractCegarLoop]: Abstraction has 41169 states and 170685 transitions. [2021-04-15 04:49:00,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 41169 states and 170685 transitions. [2021-04-15 04:49:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:00,404 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:00,404 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:49:00,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:00,607 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:00,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2097715607, now seen corresponding path program 73 times [2021-04-15 04:49:00,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:00,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236649091] [2021-04-15 04:49:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236649091] [2021-04-15 04:49:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079859541] [2021-04-15 04:49:01,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:49:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:02,483 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 37 treesize of output 29 [2021-04-15 04:49:02,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:02,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:02,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:02,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:49:02,737 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:02,737 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 39 treesize of output 27 [2021-04-15 04:49:02,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:02,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:02,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:02,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:49:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:02,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:02,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:49:02,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147032111] [2021-04-15 04:49:02,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:49:02,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:02,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:49:02,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:49:02,917 INFO L87 Difference]: Start difference. First operand 41169 states and 170685 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:03,090 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:49:03,295 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:49:03,542 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:49:05,502 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:49:06,609 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:49:07,057 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-04-15 04:49:08,143 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:49:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:11,543 INFO L93 Difference]: Finished difference Result 123805 states and 502785 transitions. [2021-04-15 04:49:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:49:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:49:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:11,989 INFO L225 Difference]: With dead ends: 123805 [2021-04-15 04:49:11,990 INFO L226 Difference]: Without dead ends: 123750 [2021-04-15 04:49:11,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 5014.8ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:49:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123750 states. [2021-04-15 04:49:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123750 to 40312. [2021-04-15 04:49:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40312 states, 40311 states have (on average 4.139490461660589) internal successors, (166867), 40311 states have internal predecessors, (166867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:13,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40312 states to 40312 states and 166867 transitions. [2021-04-15 04:49:13,775 INFO L78 Accepts]: Start accepts. Automaton has 40312 states and 166867 transitions. Word has length 39 [2021-04-15 04:49:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:13,775 INFO L480 AbstractCegarLoop]: Abstraction has 40312 states and 166867 transitions. [2021-04-15 04:49:13,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 40312 states and 166867 transitions. [2021-04-15 04:49:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:13,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:13,860 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:49:14,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:14,060 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1492735063, now seen corresponding path program 74 times [2021-04-15 04:49:14,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:14,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852979926] [2021-04-15 04:49:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:14,607 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:49:15,243 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:49:15,410 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:49:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:15,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852979926] [2021-04-15 04:49:15,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855578369] [2021-04-15 04:49:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:15,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:49:15,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:15,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:49:15,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:16,513 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:16,514 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 33 treesize of output 21 [2021-04-15 04:49:16,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:16,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:16,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:16,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-04-15 04:49:16,674 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 35 treesize of output 27 [2021-04-15 04:49:16,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:16,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:16,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:16,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:49:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:16,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:16,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:49:16,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962093008] [2021-04-15 04:49:16,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:49:16,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:16,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:49:16,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:49:16,880 INFO L87 Difference]: Start difference. First operand 40312 states and 166867 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:17,946 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 04:49:18,634 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-04-15 04:49:18,879 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:49:19,094 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:49:19,403 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:49:19,607 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:49:20,561 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-04-15 04:49:21,972 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:49:23,669 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:49:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:24,591 INFO L93 Difference]: Finished difference Result 87552 states and 355793 transitions. [2021-04-15 04:49:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:49:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:49:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:24,891 INFO L225 Difference]: With dead ends: 87552 [2021-04-15 04:49:24,891 INFO L226 Difference]: Without dead ends: 87320 [2021-04-15 04:49:24,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5313.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2211, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:49:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87320 states. [2021-04-15 04:49:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87320 to 40364. [2021-04-15 04:49:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40364 states, 40363 states have (on average 4.139162103907044) internal successors, (167069), 40363 states have internal predecessors, (167069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40364 states to 40364 states and 167069 transitions. [2021-04-15 04:49:26,342 INFO L78 Accepts]: Start accepts. Automaton has 40364 states and 167069 transitions. Word has length 39 [2021-04-15 04:49:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:26,342 INFO L480 AbstractCegarLoop]: Abstraction has 40364 states and 167069 transitions. [2021-04-15 04:49:26,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 40364 states and 167069 transitions. [2021-04-15 04:49:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:26,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:26,430 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:49:26,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-04-15 04:49:26,631 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:26,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2088779397, now seen corresponding path program 75 times [2021-04-15 04:49:26,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:26,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451961545] [2021-04-15 04:49:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:27,159 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:49:27,506 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:49:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451961545] [2021-04-15 04:49:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071066202] [2021-04-15 04:49:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:27,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:49:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:49:27,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:28,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:28,848 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 39 treesize of output 47 [2021-04-15 04:49:28,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:28,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:28,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:28,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-04-15 04:49:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:29,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-04-15 04:49:29,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:29,257 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:49:29,257 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 41 treesize of output 33 [2021-04-15 04:49:29,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:29,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:29,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:29,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-04-15 04:49:29,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:29,358 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:49:29,358 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 30 treesize of output 26 [2021-04-15 04:49:29,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:29,582 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:49:29,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:29,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 04:49:29,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:255 [2021-04-15 04:49:29,948 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 04:49:30,158 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:49:30,704 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 04:49:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:31,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:31,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:49:31,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181448988] [2021-04-15 04:49:31,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:49:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:31,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:49:31,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:49:31,013 INFO L87 Difference]: Start difference. First operand 40364 states and 167069 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:32,087 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-04-15 04:49:32,780 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:49:34,224 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-04-15 04:49:34,619 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:49:35,032 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-04-15 04:49:35,278 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:49:36,088 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:49:36,353 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 04:49:36,545 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:49:37,006 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:49:37,279 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-04-15 04:49:37,703 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 04:49:38,012 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:49:38,379 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:49:38,804 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 04:49:38,975 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:49:39,180 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:49:39,390 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:49:39,670 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-04-15 04:49:40,113 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-04-15 04:49:40,390 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-04-15 04:49:40,607 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 04:49:41,397 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:49:41,581 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-04-15 04:49:42,166 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:49:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:42,575 INFO L93 Difference]: Finished difference Result 79215 states and 320364 transitions. [2021-04-15 04:49:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:49:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:49:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:42,817 INFO L225 Difference]: With dead ends: 79215 [2021-04-15 04:49:42,817 INFO L226 Difference]: Without dead ends: 78957 [2021-04-15 04:49:42,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 9944.7ms TimeCoverageRelationStatistics Valid=801, Invalid=4311, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:49:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78957 states. [2021-04-15 04:49:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78957 to 40390. [2021-04-15 04:49:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40390 states, 40389 states have (on average 4.139320111911659) internal successors, (167183), 40389 states have internal predecessors, (167183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40390 states to 40390 states and 167183 transitions. [2021-04-15 04:49:44,108 INFO L78 Accepts]: Start accepts. Automaton has 40390 states and 167183 transitions. Word has length 39 [2021-04-15 04:49:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:44,108 INFO L480 AbstractCegarLoop]: Abstraction has 40390 states and 167183 transitions. [2021-04-15 04:49:44,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 40390 states and 167183 transitions. [2021-04-15 04:49:44,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:44,189 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:44,189 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:49:44,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:44,389 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:44,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:44,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1884858651, now seen corresponding path program 76 times [2021-04-15 04:49:44,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:44,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416757601] [2021-04-15 04:49:44,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:44,591 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:49:45,195 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:49:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:45,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416757601] [2021-04-15 04:49:45,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388453258] [2021-04-15 04:49:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:49:45,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:49:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:49:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:46,367 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 37 treesize of output 29 [2021-04-15 04:49:46,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:46,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:46,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:46,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:49:46,515 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:46,515 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 39 treesize of output 27 [2021-04-15 04:49:46,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:46,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:46,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:46,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:49:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:46,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:46,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:49:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898822175] [2021-04-15 04:49:46,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:49:46,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:49:46,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:49:46,705 INFO L87 Difference]: Start difference. First operand 40390 states and 167183 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:47,448 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:49:48,291 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:49:49,608 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 04:49:51,155 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:49:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:53,482 INFO L93 Difference]: Finished difference Result 75640 states and 308874 transitions. [2021-04-15 04:49:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:49:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:49:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:53,735 INFO L225 Difference]: With dead ends: 75640 [2021-04-15 04:49:53,736 INFO L226 Difference]: Without dead ends: 75550 [2021-04-15 04:49:53,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 4110.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:49:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75550 states. [2021-04-15 04:49:54,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75550 to 40506. [2021-04-15 04:49:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40506 states, 40505 states have (on average 4.139711146772004) internal successors, (167679), 40505 states have internal predecessors, (167679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40506 states to 40506 states and 167679 transitions. [2021-04-15 04:49:54,995 INFO L78 Accepts]: Start accepts. Automaton has 40506 states and 167679 transitions. Word has length 39 [2021-04-15 04:49:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:54,996 INFO L480 AbstractCegarLoop]: Abstraction has 40506 states and 167679 transitions. [2021-04-15 04:49:54,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 40506 states and 167679 transitions. [2021-04-15 04:49:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:55,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:55,358 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:49:55,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:55,573 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:55,573 INFO L82 PathProgramCache]: Analyzing trace with hash 278457189, now seen corresponding path program 77 times [2021-04-15 04:49:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:55,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235202651] [2021-04-15 04:49:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:56,342 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:49:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:56,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235202651] [2021-04-15 04:49:56,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319664243] [2021-04-15 04:49:56,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:56,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:49:56,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:56,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:49:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:57,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:57,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:57,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 55 [2021-04-15 04:49:57,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:58,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:58,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-04-15 04:49:58,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:73 [2021-04-15 04:49:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:58,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:58,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:58,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2021-04-15 04:49:58,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:49:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:58,858 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 14 treesize of output 8 [2021-04-15 04:49:58,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:58,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:58,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-04-15 04:49:58,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:59,094 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 04:49:59,095 INFO L628 ElimStorePlain]: treesize reduction 25, result has 73.1 percent of original size [2021-04-15 04:49:59,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-04-15 04:49:59,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:154, output treesize:52 [2021-04-15 04:49:59,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:59,402 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 9 treesize of output 14 [2021-04-15 04:49:59,407 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:49:59,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:59,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:49:59,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-04-15 04:49:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:49:59,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:59,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:49:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355746444] [2021-04-15 04:49:59,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:49:59,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:49:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:49:59,633 INFO L87 Difference]: Start difference. First operand 40506 states and 167679 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:49:59,969 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-04-15 04:50:00,233 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:50:00,546 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:50:00,866 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:50:01,825 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:50:02,131 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 04:50:03,241 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-04-15 04:50:03,909 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-04-15 04:50:04,327 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:50:05,024 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-04-15 04:50:05,561 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-04-15 04:50:05,827 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 04:50:06,807 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-04-15 04:50:07,739 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-04-15 04:50:08,126 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-04-15 04:50:08,493 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:50:08,934 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 04:50:09,507 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 04:50:09,827 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-04-15 04:50:10,119 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-04-15 04:50:10,574 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 04:50:10,925 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-04-15 04:50:11,216 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:50:11,634 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-04-15 04:50:12,313 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-04-15 04:50:12,655 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-04-15 04:50:13,301 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:50:13,788 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:50:15,221 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-04-15 04:50:16,796 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-04-15 04:50:17,138 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-04-15 04:50:17,950 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-04-15 04:50:18,178 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-04-15 04:50:19,311 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 04:50:20,691 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:50:21,351 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-04-15 04:50:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:22,150 INFO L93 Difference]: Finished difference Result 113735 states and 460760 transitions. [2021-04-15 04:50:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 04:50:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:50:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:22,573 INFO L225 Difference]: With dead ends: 113735 [2021-04-15 04:50:22,574 INFO L226 Difference]: Without dead ends: 113354 [2021-04-15 04:50:22,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 15009.0ms TimeCoverageRelationStatistics Valid=1285, Invalid=7645, Unknown=0, NotChecked=0, Total=8930 [2021-04-15 04:50:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113354 states. [2021-04-15 04:50:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113354 to 40488. [2021-04-15 04:50:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40488 states, 40487 states have (on average 4.139427470546101) internal successors, (167593), 40487 states have internal predecessors, (167593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40488 states to 40488 states and 167593 transitions. [2021-04-15 04:50:24,626 INFO L78 Accepts]: Start accepts. Automaton has 40488 states and 167593 transitions. Word has length 39 [2021-04-15 04:50:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:24,627 INFO L480 AbstractCegarLoop]: Abstraction has 40488 states and 167593 transitions. [2021-04-15 04:50:24,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 40488 states and 167593 transitions. [2021-04-15 04:50:24,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:50:24,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:50:24,713 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:50:24,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-04-15 04:50:24,913 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:50:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:50:24,913 INFO L82 PathProgramCache]: Analyzing trace with hash -120548947, now seen corresponding path program 78 times [2021-04-15 04:50:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:50:24,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307893108] [2021-04-15 04:50:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:50:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:50:25,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307893108] [2021-04-15 04:50:25,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425943935] [2021-04-15 04:50:25,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:50:25,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:50:25,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:50:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:50:25,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:26,488 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 37 treesize of output 29 [2021-04-15 04:50:26,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:26,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:26,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:26,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-04-15 04:50:26,722 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:50:26,723 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 34 treesize of output 22 [2021-04-15 04:50:26,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:26,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:26,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:26,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-04-15 04:50:26,998 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:26,998 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 16 [2021-04-15 04:50:27,004 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:50:27,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:27,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:50:27,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:50:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:50:27,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:27,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:50:27,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570043332] [2021-04-15 04:50:27,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:50:27,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:50:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:50:27,199 INFO L87 Difference]: Start difference. First operand 40488 states and 167593 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:27,855 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:50:29,076 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:50:30,228 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:50:30,587 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:50:32,571 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:50:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:35,246 INFO L93 Difference]: Finished difference Result 96582 states and 397880 transitions. [2021-04-15 04:50:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:50:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:50:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:35,593 INFO L225 Difference]: With dead ends: 96582 [2021-04-15 04:50:35,593 INFO L226 Difference]: Without dead ends: 96527 [2021-04-15 04:50:35,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 4833.4ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:50:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2021-04-15 04:50:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 42316. [2021-04-15 04:50:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42316 states, 42315 states have (on average 4.139170506912443) internal successors, (175149), 42315 states have internal predecessors, (175149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42316 states to 42316 states and 175149 transitions. [2021-04-15 04:50:37,102 INFO L78 Accepts]: Start accepts. Automaton has 42316 states and 175149 transitions. Word has length 39 [2021-04-15 04:50:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:37,102 INFO L480 AbstractCegarLoop]: Abstraction has 42316 states and 175149 transitions. [2021-04-15 04:50:37,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 42316 states and 175149 transitions. [2021-04-15 04:50:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:50:37,192 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:50:37,192 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:50:37,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:50:37,409 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:50:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:50:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash -758136977, now seen corresponding path program 79 times [2021-04-15 04:50:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:50:37,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928214891] [2021-04-15 04:50:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:50:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:50:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928214891] [2021-04-15 04:50:38,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355575454] [2021-04-15 04:50:38,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:50:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:38,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:50:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:38,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 04:50:38,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:38,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:38,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:38,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:50:39,511 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:50:39,512 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 39 treesize of output 27 [2021-04-15 04:50:39,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:39,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:39,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:39,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:50:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:50:39,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:39,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:50:39,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190403967] [2021-04-15 04:50:39,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:50:39,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:39,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:50:39,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:50:39,662 INFO L87 Difference]: Start difference. First operand 42316 states and 175149 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:47,248 INFO L93 Difference]: Finished difference Result 97967 states and 404050 transitions. [2021-04-15 04:50:47,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:50:47,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:50:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:47,570 INFO L225 Difference]: With dead ends: 97967 [2021-04-15 04:50:47,570 INFO L226 Difference]: Without dead ends: 97912 [2021-04-15 04:50:47,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3398.7ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:50:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97912 states. [2021-04-15 04:50:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97912 to 44367. [2021-04-15 04:50:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44367 states, 44366 states have (on average 4.141955551548483) internal successors, (183762), 44366 states have internal predecessors, (183762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44367 states to 44367 states and 183762 transitions. [2021-04-15 04:50:49,022 INFO L78 Accepts]: Start accepts. Automaton has 44367 states and 183762 transitions. Word has length 39 [2021-04-15 04:50:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:49,022 INFO L480 AbstractCegarLoop]: Abstraction has 44367 states and 183762 transitions. [2021-04-15 04:50:49,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 44367 states and 183762 transitions. [2021-04-15 04:50:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:50:49,104 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:50:49,104 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:50:49,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-04-15 04:50:49,305 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:50:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:50:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash 660856047, now seen corresponding path program 80 times [2021-04-15 04:50:49,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:50:49,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964551653] [2021-04-15 04:50:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:50:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:49,477 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:50:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:50:50,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964551653] [2021-04-15 04:50:50,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819064482] [2021-04-15 04:50:50,186 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 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 [2021-04-15 04:50:50,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:50:50,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:50:50,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:50:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:50,815 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 37 treesize of output 29 [2021-04-15 04:50:50,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:50,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:50,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:50,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:50:51,191 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:50:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-04-15 04:50:51,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:51,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:51,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:51,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:50:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:50:51,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:51,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:50:51,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791605035] [2021-04-15 04:50:51,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:50:51,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:50:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:50:51,347 INFO L87 Difference]: Start difference. First operand 44367 states and 183762 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:53,029 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:50:53,397 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:50:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:57,780 INFO L93 Difference]: Finished difference Result 94017 states and 387403 transitions. [2021-04-15 04:50:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:50:57,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:50:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:58,103 INFO L225 Difference]: With dead ends: 94017 [2021-04-15 04:50:58,103 INFO L226 Difference]: Without dead ends: 93962 [2021-04-15 04:50:58,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 3319.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:50:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93962 states. [2021-04-15 04:50:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93962 to 43759. [2021-04-15 04:50:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43759 states, 43758 states have (on average 4.140911376205493) internal successors, (181198), 43758 states have internal predecessors, (181198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43759 states to 43759 states and 181198 transitions. [2021-04-15 04:50:59,717 INFO L78 Accepts]: Start accepts. Automaton has 43759 states and 181198 transitions. Word has length 39 [2021-04-15 04:50:59,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:59,717 INFO L480 AbstractCegarLoop]: Abstraction has 43759 states and 181198 transitions. [2021-04-15 04:50:59,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:50:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 43759 states and 181198 transitions. [2021-04-15 04:51:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:00,153 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:00,153 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:51:00,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-04-15 04:51:00,371 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1354477999, now seen corresponding path program 81 times [2021-04-15 04:51:00,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:00,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779767759] [2021-04-15 04:51:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:51:01,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779767759] [2021-04-15 04:51:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113123089] [2021-04-15 04:51:01,251 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 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 [2021-04-15 04:51:01,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:51:01,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:01,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-04-15 04:51:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:51:02,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:02,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-04-15 04:51:02,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:02,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:02,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:51:02,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-04-15 04:51:02,755 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-04-15 04:51:03,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:03,227 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 30 treesize of output 30 [2021-04-15 04:51:03,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:51:03,277 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:03,278 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 30 treesize of output 30 [2021-04-15 04:51:03,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 04:51:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:03,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:03,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-04-15 04:51:03,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:03,605 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:51:03,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:03,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 04:51:03,627 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:183, output treesize:198 [2021-04-15 04:51:03,888 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:51:04,100 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 04:51:04,156 INFO L446 ElimStorePlain]: Different costs {0=[q2], 1=[v_prenex_36]} [2021-04-15 04:51:04,164 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 13 treesize of output 5 [2021-04-15 04:51:04,172 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:51:04,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:04,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:04,274 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 3 [2021-04-15 04:51:04,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,405 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-04-15 04:51:04,406 INFO L628 ElimStorePlain]: treesize reduction 13, result has 72.3 percent of original size [2021-04-15 04:51:04,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:51:04,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:32 [2021-04-15 04:51:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:51:04,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:51:04,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:51:04,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103310472] [2021-04-15 04:51:04,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:51:04,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:51:04,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:51:04,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:51:04,667 INFO L87 Difference]: Start difference. First operand 43759 states and 181198 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:08,104 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-04-15 04:51:10,107 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-04-15 04:51:11,101 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-04-15 04:51:11,844 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 04:51:12,187 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-04-15 04:51:12,789 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 04:51:13,158 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:51:13,807 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-04-15 04:51:14,110 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 04:51:14,673 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-04-15 04:51:15,479 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:51:15,682 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:51:16,475 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-04-15 04:51:16,766 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-04-15 04:51:17,342 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-04-15 04:51:18,000 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-04-15 04:51:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:51:18,461 INFO L93 Difference]: Finished difference Result 85716 states and 351669 transitions. [2021-04-15 04:51:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:51:18,466 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:51:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:51:18,727 INFO L225 Difference]: With dead ends: 85716 [2021-04-15 04:51:18,727 INFO L226 Difference]: Without dead ends: 85634 [2021-04-15 04:51:18,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 9225.3ms TimeCoverageRelationStatistics Valid=461, Invalid=3571, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 04:51:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85634 states. [2021-04-15 04:51:19,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85634 to 43965. [2021-04-15 04:51:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43965 states, 43964 states have (on average 4.1390910745155125) internal successors, (181971), 43964 states have internal predecessors, (181971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43965 states to 43965 states and 181971 transitions. [2021-04-15 04:51:20,040 INFO L78 Accepts]: Start accepts. Automaton has 43965 states and 181971 transitions. Word has length 39 [2021-04-15 04:51:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:51:20,041 INFO L480 AbstractCegarLoop]: Abstraction has 43965 states and 181971 transitions. [2021-04-15 04:51:20,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 43965 states and 181971 transitions. [2021-04-15 04:51:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:20,373 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:20,373 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:51:20,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-04-15 04:51:20,574 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:20,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1521496273, now seen corresponding path program 82 times [2021-04-15 04:51:20,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:20,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453922861] [2021-04-15 04:51:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:20,763 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:51:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:51:21,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453922861] [2021-04-15 04:51:21,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611209956] [2021-04-15 04:51:21,516 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 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 [2021-04-15 04:51:21,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:51:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:51:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:51:22,251 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 37 treesize of output 29 [2021-04-15 04:51:22,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:22,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:22,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:51:22,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:51:22,669 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:51:22,670 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 39 treesize of output 27 [2021-04-15 04:51:22,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:22,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:22,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:51:22,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:51:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:51:22,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:51:22,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:51:22,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136232442] [2021-04-15 04:51:22,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:51:22,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:51:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:51:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:51:22,840 INFO L87 Difference]: Start difference. First operand 43965 states and 181971 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:25,717 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:51:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:51:32,088 INFO L93 Difference]: Finished difference Result 94685 states and 390543 transitions. [2021-04-15 04:51:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:51:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:51:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:51:32,460 INFO L225 Difference]: With dead ends: 94685 [2021-04-15 04:51:32,460 INFO L226 Difference]: Without dead ends: 94630 [2021-04-15 04:51:32,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 3470.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:51:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94630 states. [2021-04-15 04:51:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94630 to 44548. [2021-04-15 04:51:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44548 states, 44547 states have (on average 4.142703212337532) internal successors, (184545), 44547 states have internal predecessors, (184545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44548 states to 44548 states and 184545 transitions. [2021-04-15 04:51:34,096 INFO L78 Accepts]: Start accepts. Automaton has 44548 states and 184545 transitions. Word has length 39 [2021-04-15 04:51:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:51:34,096 INFO L480 AbstractCegarLoop]: Abstraction has 44548 states and 184545 transitions. [2021-04-15 04:51:34,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:34,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44548 states and 184545 transitions. [2021-04-15 04:51:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:34,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:34,200 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:51:34,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:51:34,400 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash -855789521, now seen corresponding path program 83 times [2021-04-15 04:51:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:34,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530524084] [2021-04-15 04:51:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:34,609 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:51:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:51:35,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530524084] [2021-04-15 04:51:35,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332535870] [2021-04-15 04:51:35,559 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 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 [2021-04-15 04:51:35,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:51:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:51:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:51:36,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:36,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:36,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 65 [2021-04-15 04:51:36,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:37,070 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:51:37,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:37,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:51:37,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:87 [2021-04-15 04:51:38,765 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-04-15 04:51:40,434 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:51:40,913 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_54, v_prenex_57, v_prenex_48], 3=[q2, v_prenex_51]} [2021-04-15 04:51:40,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:40,930 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 9 treesize of output 5 [2021-04-15 04:51:40,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:41,205 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-04-15 04:51:41,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:41,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:41,222 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 9 treesize of output 5 [2021-04-15 04:51:41,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:41,498 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-04-15 04:51:41,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:41,515 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 15 [2021-04-15 04:51:41,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:41,759 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 04:51:41,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:41,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:51:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:41,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-04-15 04:51:41,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:41,994 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 04:51:41,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:42,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:51:42,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 15 [2021-04-15 04:51:42,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:42,220 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:51:42,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:42,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-04-15 04:51:42,234 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 17 variables, input treesize:204, output treesize:69 [2021-04-15 04:51:42,532 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:51:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:42,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:42,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-04-15 04:51:42,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:51:43,061 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 04:51:43,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:43,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-04-15 04:51:43,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:58 [2021-04-15 04:51:43,294 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:51:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:51:43,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:51:43,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:51:43,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198868476] [2021-04-15 04:51:43,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:51:43,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:51:43,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:51:43,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:51:43,586 INFO L87 Difference]: Start difference. First operand 44548 states and 184545 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:51:44,004 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-04-15 04:51:44,285 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 04:51:44,629 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 04:51:45,388 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 30 [2021-04-15 04:51:46,183 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 37 [2021-04-15 04:51:47,153 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-04-15 04:51:48,027 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 44 [2021-04-15 04:51:49,314 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 04:51:50,036 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-04-15 04:51:50,723 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-04-15 04:51:51,314 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-04-15 04:51:52,122 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-04-15 04:51:52,814 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2021-04-15 04:51:53,448 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-04-15 04:51:54,136 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:51:54,664 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-04-15 04:51:55,863 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 04:51:56,486 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-04-15 04:51:57,339 WARN L205 SmtUtils]: Spent 669.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-04-15 04:51:57,751 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-04-15 04:51:58,269 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-04-15 04:51:59,113 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-04-15 04:52:00,009 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-04-15 04:52:00,737 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-04-15 04:52:01,726 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-04-15 04:52:02,949 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-04-15 04:52:04,004 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-04-15 04:52:04,475 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:52:05,240 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-04-15 04:52:05,866 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 04:52:07,247 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-04-15 04:52:08,604 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-04-15 04:52:09,294 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-04-15 04:52:09,693 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-04-15 04:52:10,344 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 04:52:11,040 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-04-15 04:52:11,907 WARN L205 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-04-15 04:52:12,598 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-04-15 04:52:13,389 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-04-15 04:52:14,298 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 04:52:15,342 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 04:52:15,652 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:52:16,020 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:52:16,453 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-04-15 04:52:17,371 WARN L205 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-04-15 04:52:18,383 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-04-15 04:52:19,066 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-04-15 04:52:19,631 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-04-15 04:52:20,930 WARN L205 SmtUtils]: Spent 955.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-04-15 04:52:21,686 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 04:52:22,050 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:52:22,409 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 04:52:23,103 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-04-15 04:52:23,802 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-04-15 04:52:24,288 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-04-15 04:52:25,733 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2021-04-15 04:52:26,440 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-04-15 04:52:27,316 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-04-15 04:52:27,688 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 04:52:28,582 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-04-15 04:52:29,372 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-04-15 04:52:30,543 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-04-15 04:52:31,300 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-04-15 04:52:32,034 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:52:32,599 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-04-15 04:52:33,385 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:52:34,510 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-04-15 04:52:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:52:35,072 INFO L93 Difference]: Finished difference Result 75247 states and 306248 transitions. [2021-04-15 04:52:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-04-15 04:52:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:52:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:52:35,296 INFO L225 Difference]: With dead ends: 75247 [2021-04-15 04:52:35,297 INFO L226 Difference]: Without dead ends: 75137 [2021-04-15 04:52:35,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 42811.4ms TimeCoverageRelationStatistics Valid=1384, Invalid=10172, Unknown=0, NotChecked=0, Total=11556 [2021-04-15 04:52:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75137 states. [2021-04-15 04:52:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75137 to 44898. [2021-04-15 04:52:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44898 states, 44897 states have (on average 4.141434839744304) internal successors, (185938), 44897 states have internal predecessors, (185938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:52:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44898 states to 44898 states and 185938 transitions. [2021-04-15 04:52:36,915 INFO L78 Accepts]: Start accepts. Automaton has 44898 states and 185938 transitions. Word has length 39 [2021-04-15 04:52:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:52:36,915 INFO L480 AbstractCegarLoop]: Abstraction has 44898 states and 185938 transitions. [2021-04-15 04:52:36,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:52:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 44898 states and 185938 transitions. [2021-04-15 04:52:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:52:37,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:52:37,013 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:52:37,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-04-15 04:52:37,214 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:52:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:52:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1796157531, now seen corresponding path program 84 times [2021-04-15 04:52:37,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:52:37,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142320146] [2021-04-15 04:52:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:52:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:37,418 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:52:38,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:52:38,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142320146] [2021-04-15 04:52:38,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710070373] [2021-04-15 04:52:38,387 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:52:38,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:52:38,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:52:38,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:52:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:39,119 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 37 treesize of output 29 [2021-04-15 04:52:39,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:39,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:39,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:39,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-04-15 04:52:39,581 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:52:39,582 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 41 treesize of output 29 [2021-04-15 04:52:39,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:39,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:39,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:39,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-04-15 04:52:39,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:52:39,733 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 13 treesize of output 5 [2021-04-15 04:52:39,743 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:52:39,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:39,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:39,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-04-15 04:52:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:52:39,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:39,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:52:39,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341576071] [2021-04-15 04:52:39,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:52:39,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:52:39,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:52:39,992 INFO L87 Difference]: Start difference. First operand 44898 states and 185938 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:52:40,253 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:52:40,504 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:52:40,785 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:52:41,103 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:52:42,678 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:52:43,028 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:52:43,281 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:52:43,546 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:52:44,085 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:52:44,536 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:52:45,577 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:52:45,834 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:52:46,932 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:52:48,178 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:52:48,541 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:52:48,757 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:52:49,347 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:52:50,016 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-04-15 04:52:50,862 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-04-15 04:52:51,909 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:52:53,697 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:52:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:52:54,400 INFO L93 Difference]: Finished difference Result 133245 states and 537511 transitions. [2021-04-15 04:52:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:52:54,405 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:52:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:52:54,853 INFO L225 Difference]: With dead ends: 133245 [2021-04-15 04:52:54,853 INFO L226 Difference]: Without dead ends: 132892 [2021-04-15 04:52:54,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 8523.8ms TimeCoverageRelationStatistics Valid=760, Invalid=3272, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 04:52:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132892 states. [2021-04-15 04:52:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132892 to 48526. [2021-04-15 04:52:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48526 states, 48525 states have (on average 4.13613601236476) internal successors, (200706), 48525 states have internal predecessors, (200706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:52:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48526 states to 48526 states and 200706 transitions. [2021-04-15 04:52:57,074 INFO L78 Accepts]: Start accepts. Automaton has 48526 states and 200706 transitions. Word has length 39 [2021-04-15 04:52:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:52:57,074 INFO L480 AbstractCegarLoop]: Abstraction has 48526 states and 200706 transitions. [2021-04-15 04:52:57,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:52:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 48526 states and 200706 transitions. [2021-04-15 04:52:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:52:57,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:52:57,166 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:52:57,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-04-15 04:52:57,368 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:52:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:52:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1950641299, now seen corresponding path program 85 times [2021-04-15 04:52:57,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:52:57,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184421116] [2021-04-15 04:52:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:52:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:57,580 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:52:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:52:58,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184421116] [2021-04-15 04:52:58,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091018968] [2021-04-15 04:52:58,552 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 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 [2021-04-15 04:52:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:58,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:52:58,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:59,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 04:52:59,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:59,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:59,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:59,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:52:59,620 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:52:59,621 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 34 treesize of output 22 [2021-04-15 04:52:59,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:59,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:59,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:59,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-04-15 04:52:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:52:59,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:59,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:52:59,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928552710] [2021-04-15 04:52:59,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:52:59,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:59,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:52:59,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:52:59,977 INFO L87 Difference]: Start difference. First operand 48526 states and 200706 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:00,240 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:53:00,544 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:53:00,857 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:53:01,167 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:53:02,877 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-04-15 04:53:03,540 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:53:03,773 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:53:04,007 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:53:04,469 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:53:05,033 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-04-15 04:53:05,982 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:53:06,199 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 04:53:06,592 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:53:07,809 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:53:09,231 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:53:10,246 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:53:12,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:53:12,209 INFO L93 Difference]: Finished difference Result 139638 states and 567042 transitions. [2021-04-15 04:53:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:53:12,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:53:12,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:53:12,731 INFO L225 Difference]: With dead ends: 139638 [2021-04-15 04:53:12,731 INFO L226 Difference]: Without dead ends: 139583 [2021-04-15 04:53:12,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 7421.4ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:53:12,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139583 states. [2021-04-15 04:53:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139583 to 48438. [2021-04-15 04:53:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48438 states, 48437 states have (on average 4.1382207816338745) internal successors, (200443), 48437 states have internal predecessors, (200443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48438 states to 48438 states and 200443 transitions. [2021-04-15 04:53:15,223 INFO L78 Accepts]: Start accepts. Automaton has 48438 states and 200443 transitions. Word has length 39 [2021-04-15 04:53:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:53:15,223 INFO L480 AbstractCegarLoop]: Abstraction has 48438 states and 200443 transitions. [2021-04-15 04:53:15,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 48438 states and 200443 transitions. [2021-04-15 04:53:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:53:15,339 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:53:15,340 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:53:15,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:53:15,540 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:53:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:53:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2070849197, now seen corresponding path program 86 times [2021-04-15 04:53:15,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:53:15,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301072883] [2021-04-15 04:53:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:53:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:53:15,672 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:53:15,814 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:53:16,489 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:53:16,764 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:53:16,973 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:53:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:53:17,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301072883] [2021-04-15 04:53:17,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243783580] [2021-04-15 04:53:17,324 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 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 [2021-04-15 04:53:17,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:53:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:53:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:53:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:53:18,438 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:53:18,439 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 33 treesize of output 21 [2021-04-15 04:53:18,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:18,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:18,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:53:18,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:53:18,666 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 35 treesize of output 27 [2021-04-15 04:53:18,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:18,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:18,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:53:18,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:53:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:53:18,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:53:18,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:53:18,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340206105] [2021-04-15 04:53:18,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:53:18,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:53:18,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:53:18,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:53:18,920 INFO L87 Difference]: Start difference. First operand 48438 states and 200443 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:19,753 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:53:20,534 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-04-15 04:53:20,806 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:53:21,083 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:53:21,468 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:53:21,717 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:53:22,023 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:53:22,766 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:53:23,510 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:53:24,038 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 04:53:24,817 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 04:53:25,524 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:53:26,030 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:53:26,919 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 04:53:27,719 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:53:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:53:28,781 INFO L93 Difference]: Finished difference Result 83893 states and 343260 transitions. [2021-04-15 04:53:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 04:53:28,786 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:53:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:53:29,056 INFO L225 Difference]: With dead ends: 83893 [2021-04-15 04:53:29,056 INFO L226 Difference]: Without dead ends: 83645 [2021-04-15 04:53:29,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 7184.3ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:53:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83645 states. [2021-04-15 04:53:30,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83645 to 48768. [2021-04-15 04:53:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48768 states, 48767 states have (on average 4.135645005844116) internal successors, (201683), 48767 states have internal predecessors, (201683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48768 states to 48768 states and 201683 transitions. [2021-04-15 04:53:30,569 INFO L78 Accepts]: Start accepts. Automaton has 48768 states and 201683 transitions. Word has length 39 [2021-04-15 04:53:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:53:30,569 INFO L480 AbstractCegarLoop]: Abstraction has 48768 states and 201683 transitions. [2021-04-15 04:53:30,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 48768 states and 201683 transitions. [2021-04-15 04:53:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:53:30,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:53:30,671 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:53:30,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:53:30,871 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:53:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:53:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash -53763145, now seen corresponding path program 87 times [2021-04-15 04:53:30,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:53:30,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089518953] [2021-04-15 04:53:30,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:53:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:53:31,022 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:53:31,200 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:53:31,936 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:53:32,225 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:53:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:53:32,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089518953] [2021-04-15 04:53:32,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704064012] [2021-04-15 04:53:32,677 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 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 [2021-04-15 04:53:32,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:53:32,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:53:32,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:53:32,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:53:34,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:34,647 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 39 treesize of output 47 [2021-04-15 04:53:34,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:34,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:34,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:53:34,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-04-15 04:53:35,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:35,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:35,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-04-15 04:53:35,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:35,286 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:53:35,287 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 30 treesize of output 26 [2021-04-15 04:53:35,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:35,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:35,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:35,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-04-15 04:53:35,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:35,463 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:53:35,463 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 41 treesize of output 33 [2021-04-15 04:53:35,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:35,877 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:53:35,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:35,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-04-15 04:53:35,899 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:255 [2021-04-15 04:53:36,507 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 04:53:36,815 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:53:37,244 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 04:53:37,524 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-04-15 04:53:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:53:37,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:53:37,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:53:37,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192170797] [2021-04-15 04:53:37,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:53:37,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:53:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:53:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:53:37,688 INFO L87 Difference]: Start difference. First operand 48768 states and 201683 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:39,515 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-04-15 04:53:40,693 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:53:41,814 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:53:43,150 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-04-15 04:53:44,268 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:53:44,812 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:53:45,336 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:53:46,156 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 04:53:46,496 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:53:47,290 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-04-15 04:53:47,787 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:53:48,082 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:53:48,332 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 04:53:48,823 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:53:49,680 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-04-15 04:53:50,061 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:53:50,624 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:53:51,137 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:53:51,614 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 04:53:51,900 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:53:52,246 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:53:53,389 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-04-15 04:53:53,817 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:53:54,520 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-04-15 04:53:55,101 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:53:56,113 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:53:56,419 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-04-15 04:53:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:53:57,253 INFO L93 Difference]: Finished difference Result 89977 states and 364283 transitions. [2021-04-15 04:53:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:53:57,258 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:53:57,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:53:57,545 INFO L225 Difference]: With dead ends: 89977 [2021-04-15 04:53:57,545 INFO L226 Difference]: Without dead ends: 89687 [2021-04-15 04:53:57,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 14908.8ms TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 04:53:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89687 states. [2021-04-15 04:53:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89687 to 48812. [2021-04-15 04:53:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48812 states, 48811 states have (on average 4.135604679273115) internal successors, (201863), 48811 states have internal predecessors, (201863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48812 states to 48812 states and 201863 transitions. [2021-04-15 04:53:59,436 INFO L78 Accepts]: Start accepts. Automaton has 48812 states and 201863 transitions. Word has length 39 [2021-04-15 04:53:59,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:53:59,436 INFO L480 AbstractCegarLoop]: Abstraction has 48812 states and 201863 transitions. [2021-04-15 04:53:59,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:53:59,436 INFO L276 IsEmpty]: Start isEmpty. Operand 48812 states and 201863 transitions. [2021-04-15 04:53:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:53:59,543 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:53:59,543 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:53:59,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:53:59,744 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:53:59,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:53:59,744 INFO L82 PathProgramCache]: Analyzing trace with hash 150157601, now seen corresponding path program 88 times [2021-04-15 04:53:59,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:53:59,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800389198] [2021-04-15 04:53:59,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:53:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:53:59,888 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:54:00,050 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:54:00,772 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:54:01,059 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:54:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:54:01,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800389198] [2021-04-15 04:54:01,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950097134] [2021-04-15 04:54:01,536 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 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 [2021-04-15 04:54:01,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:54:01,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:54:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:54:01,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:54:02,741 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 37 treesize of output 29 [2021-04-15 04:54:02,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:02,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:02,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:54:02,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:54:02,950 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:54:02,951 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 39 treesize of output 27 [2021-04-15 04:54:02,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:02,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:02,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:54:02,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:54:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:54:03,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:54:03,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:54:03,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359220881] [2021-04-15 04:54:03,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:54:03,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:54:03,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:54:03,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:54:03,268 INFO L87 Difference]: Start difference. First operand 48812 states and 201863 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:54:03,786 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-04-15 04:54:04,503 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:54:05,533 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:54:06,056 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:54:08,178 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:54:08,730 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:54:09,839 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:54:11,181 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 04:54:11,677 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-04-15 04:54:12,624 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-04-15 04:54:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:54:14,365 INFO L93 Difference]: Finished difference Result 86371 states and 352871 transitions. [2021-04-15 04:54:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:54:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:54:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:54:14,655 INFO L225 Difference]: With dead ends: 86371 [2021-04-15 04:54:14,656 INFO L226 Difference]: Without dead ends: 86265 [2021-04-15 04:54:14,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 6464.7ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 04:54:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86265 states. [2021-04-15 04:54:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86265 to 48938. [2021-04-15 04:54:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48938 states, 48937 states have (on average 4.135786827962482) internal successors, (202393), 48937 states have internal predecessors, (202393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:54:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48938 states to 48938 states and 202393 transitions. [2021-04-15 04:54:16,153 INFO L78 Accepts]: Start accepts. Automaton has 48938 states and 202393 transitions. Word has length 39 [2021-04-15 04:54:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:54:16,153 INFO L480 AbstractCegarLoop]: Abstraction has 48938 states and 202393 transitions. [2021-04-15 04:54:16,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:54:16,153 INFO L276 IsEmpty]: Start isEmpty. Operand 48938 states and 202393 transitions. [2021-04-15 04:54:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:54:16,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:54:16,246 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:54:16,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-04-15 04:54:16,446 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:54:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:54:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1981493855, now seen corresponding path program 89 times [2021-04-15 04:54:16,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:54:16,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141125097] [2021-04-15 04:54:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:54:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:54:16,585 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:54:16,734 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:54:17,474 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:54:17,769 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:54:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:54:18,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141125097] [2021-04-15 04:54:18,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270714437] [2021-04-15 04:54:18,237 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 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 [2021-04-15 04:54:18,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:54:18,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:54:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:54:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:54:18,700 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-04-15 04:54:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:20,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:20,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 57 [2021-04-15 04:54:20,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:20,664 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:20,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:20,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-04-15 04:54:20,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:110 [2021-04-15 04:54:23,289 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 04:54:23,453 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_60], 3=[q1], 6=[v_prenex_61]} [2021-04-15 04:54:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:23,470 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 16 treesize of output 10 [2021-04-15 04:54:23,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:23,700 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 04:54:23,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:23,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:23,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 30 [2021-04-15 04:54:23,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:23,965 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 04:54:23,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:23,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:24,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:24,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:24,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 59 [2021-04-15 04:54:24,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:54:24,557 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-04-15 04:54:24,559 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-04-15 04:54:24,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2021-04-15 04:54:24,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:156, output treesize:76 [2021-04-15 04:54:24,897 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:54:25,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:25,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:54:25,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:25,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-04-15 04:54:25,330 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:54:25,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:25,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:54:25,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:54:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:54:25,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:54:25,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-04-15 04:54:25,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402347334] [2021-04-15 04:54:25,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:54:25,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:54:25,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:54:25,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=850, Unknown=1, NotChecked=0, Total=992 [2021-04-15 04:54:25,752 INFO L87 Difference]: Start difference. First operand 48938 states and 202393 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:54:26,334 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-04-15 04:54:26,770 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:54:27,224 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:54:27,793 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-04-15 04:54:28,060 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:54:28,689 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 04:54:29,251 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 04:54:29,670 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-04-15 04:54:30,070 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:54:30,351 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 04:54:30,935 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-04-15 04:54:31,409 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:54:32,033 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 04:54:32,666 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2021-04-15 04:54:33,233 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:54:33,791 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-04-15 04:54:34,324 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2021-04-15 04:54:34,700 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 04:54:34,927 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:54:35,461 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 04:54:36,181 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-04-15 04:54:36,540 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-04-15 04:54:37,493 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-04-15 04:54:38,042 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-04-15 04:54:38,628 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-04-15 04:54:39,104 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-04-15 04:54:40,123 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-04-15 04:54:40,532 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-04-15 04:54:40,907 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 04:54:41,932 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-04-15 04:54:42,200 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:54:42,640 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:43,007 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-04-15 04:54:43,328 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-04-15 04:54:43,653 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:54:44,093 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:54:44,512 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:54:45,009 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-04-15 04:54:45,410 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:54:45,719 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:54:46,270 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:54:46,603 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 04:54:46,896 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:54:47,728 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 04:54:48,392 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:54:48,597 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:54:49,520 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:49,752 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 04:54:50,187 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:54:51,217 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:54:51,778 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-04-15 04:54:52,736 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:54:53,528 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-04-15 04:54:53,917 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:54:54,325 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:54:54,676 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:54:55,526 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 04:54:55,818 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-04-15 04:54:56,485 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:54:56,781 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:54:57,580 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:54:58,346 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 04:54:58,868 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 04:54:59,188 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-04-15 04:55:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:00,634 INFO L93 Difference]: Finished difference Result 126466 states and 511867 transitions. [2021-04-15 04:55:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-04-15 04:55:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-04-15 04:55:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:01,062 INFO L225 Difference]: With dead ends: 126466 [2021-04-15 04:55:01,062 INFO L226 Difference]: Without dead ends: 126047 [2021-04-15 04:55:01,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 28766.9ms TimeCoverageRelationStatistics Valid=1614, Invalid=9941, Unknown=1, NotChecked=0, Total=11556 [2021-04-15 04:55:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126047 states. [2021-04-15 04:55:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126047 to 48913. [2021-04-15 04:55:03,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48913 states, 48912 states have (on average 4.135508668629376) internal successors, (202276), 48912 states have internal predecessors, (202276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48913 states to 48913 states and 202276 transitions. [2021-04-15 04:55:03,223 INFO L78 Accepts]: Start accepts. Automaton has 48913 states and 202276 transitions. Word has length 39 [2021-04-15 04:55:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 48913 states and 202276 transitions. [2021-04-15 04:55:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 48913 states and 202276 transitions. [2021-04-15 04:55:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:55:03,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:03,324 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:55:03,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-04-15 04:55:03,525 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:03,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash -564113161, now seen corresponding path program 90 times [2021-04-15 04:55:03,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:03,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617644569] [2021-04-15 04:55:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:03,663 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:55:03,832 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:55:04,615 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:55:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:05,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617644569] [2021-04-15 04:55:05,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054061480] [2021-04-15 04:55:05,248 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 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 [2021-04-15 04:55:05,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:55:05,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:55:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:06,410 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 37 treesize of output 29 [2021-04-15 04:55:06,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:06,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:06,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:06,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:55:06,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:55:06,745 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 39 treesize of output 27 [2021-04-15 04:55:06,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:06,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:06,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:06,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:55:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:55:07,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:07,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:55:07,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260218562] [2021-04-15 04:55:07,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:55:07,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:07,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:55:07,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:55:07,040 INFO L87 Difference]: Start difference. First operand 48913 states and 202276 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:55:09,305 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:55:09,912 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:55:10,310 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:55:11,497 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 04:55:11,993 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:55:12,323 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:55:13,031 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:55:14,038 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 Received shutdown request... [2021-04-15 04:55:14,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:55:14,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:14,916 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 04:55:14,919 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 04:55:14,919 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:55:14 BasicIcfg [2021-04-15 04:55:14,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:55:14,919 INFO L168 Benchmark]: Toolchain (without parser) took 806215.21 ms. Allocated memory was 255.9 MB in the beginning and 15.0 GB in the end (delta: 14.7 GB). Free memory was 236.6 MB in the beginning and 10.7 GB in the end (delta: -10.5 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-04-15 04:55:14,919 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:55:14,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.78 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:55:14,920 INFO L168 Benchmark]: Boogie Preprocessor took 14.29 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 931.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:55:14,920 INFO L168 Benchmark]: RCFGBuilder took 280.24 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.5 MB in the end (delta: -1.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-04-15 04:55:14,920 INFO L168 Benchmark]: TraceAbstraction took 805899.27 ms. Allocated memory was 255.9 MB in the beginning and 15.0 GB in the end (delta: 14.7 GB). Free memory was 235.5 MB in the beginning and 10.7 GB in the end (delta: -10.5 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. [2021-04-15 04:55:14,920 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 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.78 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.29 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 931.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 280.24 ms. Allocated memory is still 255.9 MB. Free memory was 234.0 MB in the beginning and 235.5 MB in the end (delta: -1.6 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 805899.27 ms. Allocated memory was 255.9 MB in the beginning and 15.0 GB in the end (delta: 14.7 GB). Free memory was 235.5 MB in the beginning and 10.7 GB in the end (delta: -10.5 GB). Peak memory consumption was 4.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 82). Cancelled while BasicCegarLoop was constructing difference of abstraction (48913states) and FLOYD_HOARE automaton (currently 27 states, 27 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 47 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 805789.8ms, OverallIterations: 99, TraceHistogramMax: 2, EmptinessCheckTime: 7535.1ms, AutomataDifference: 527269.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 60.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7041 SDtfs, 40572 SDslu, 79850 SDs, 0 SdLazy, 144669 SolverSat, 7724 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 101913.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6775 GetRequests, 2509 SyntacticMatches, 108 SemanticMatches, 4157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68782 ImplicationChecksByTransitivity, 341455.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48938occurred in iteration=97, InterpolantAutomatonStates: 3082, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105110.7ms AutomataMinimizationTime, 98 MinimizatonAttempts, 3144771 StatesRemovedByMinimization, 98 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 465.6ms SsaConstructionTime, 2119.3ms SatisfiabilityAnalysisTime, 142237.1ms InterpolantComputationTime, 7069 NumberOfCodeBlocks, 7065 NumberOfCodeBlocksAsserted, 344 NumberOfCheckSat, 6877 ConstructedInterpolants, 309 QuantifiedInterpolants, 162509 SizeOfPredicates, 651 NumberOfNonLiveVariables, 10454 ConjunctsInSsa, 3338 ConjunctsInUnsatCore, 192 InterpolantComputations, 8 PerfectInterpolantSequences, 222/2928 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