/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:43:43,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:43:43,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:43:43,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 04:43:43,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 04:43:43,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 04:43:43,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 04:43:43,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 04:43:43,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 04:43:43,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 04:43:43,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 04:43:43,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 04:43:43,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 04:43:43,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 04:43:43,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 04:43:43,472 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 04:43:43,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:43:43,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:43:43,488 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:43:43,488 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:43:43,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:43:43,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:43:43,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:43:43,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:43:43,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:43:43,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:43:43,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:43:43,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:43:43,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:43:43,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:43:43,491 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:43:43,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:43:43,491 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:43:43,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:43:43,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:43:43,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:43:43,723 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:43:43,725 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:43:43,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl [2021-04-15 04:43:43,726 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series.wvr.bpl' [2021-04-15 04:43:43,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:43:43,827 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:43:43,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:43:43,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:43:43,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:43:43,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:43:43,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:43:43,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:43:43,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:43:43,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/1) ... [2021-04-15 04:43:43,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:43:43,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:43:43,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:43:43,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:43:43,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (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 04:43:43,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:43:43,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:43:43,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:43:43,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:43:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:43:43,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:43:43,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:43:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:43:43,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:43:43,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 04:43:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 04:43:43,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 04:43:43,923 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-04-15 04:43:43,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-04-15 04:43:43,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-04-15 04:43:43,924 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 04:43:44,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:43:44,168 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:43:44,169 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:43:44 BoogieIcfgContainer [2021-04-15 04:43:44,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:43:44,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:43:44,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:43:44,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:43:44,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:43:43" (1/2) ... [2021-04-15 04:43:44,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9b49c7 and model type buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:43:44, skipping insertion in model container [2021-04-15 04:43:44,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:43:44" (2/2) ... [2021-04-15 04:43:44,174 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series.wvr.bpl [2021-04-15 04:43:44,177 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:43:44,178 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:43:44,180 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:43:44,180 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:43:44,238 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-04-15 04:43:44,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-04-15 04:43:44,278 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:43:44,278 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:43:44,278 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:43:44,278 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:43:44,278 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:43:44,279 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:43:44,279 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:43:44,279 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:43:44,290 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-04-15 04:43:44,338 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 04:43:44,341 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 04:43:44,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:43:44,360 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:44,361 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:43:44,361 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:44,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-04-15 04:43:44,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:44,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279880200] [2021-04-15 04:43:44,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:44,493 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 04:43:44,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279880200] [2021-04-15 04:43:44,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:43:44,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 04:43:44,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821583848] [2021-04-15 04:43:44,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:43:44,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:43:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:43:44,507 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 04:43:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:44,546 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-04-15 04:43:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:43:44,547 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 04:43:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:44,566 INFO L225 Difference]: With dead ends: 1236 [2021-04-15 04:43:44,566 INFO L226 Difference]: Without dead ends: 1109 [2021-04-15 04:43:44,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:43:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-04-15 04:43:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-04-15 04:43:44,653 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 04:43:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-04-15 04:43:44,657 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-04-15 04:43:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:44,667 INFO L480 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-04-15 04:43:44,667 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 04:43:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-04-15 04:43:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:43:44,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:44,671 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 04:43:44,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:43:44,671 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-04-15 04:43:44,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:44,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920043453] [2021-04-15 04:43:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:44,729 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 04:43:44,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920043453] [2021-04-15 04:43:44,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:43:44,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:43:44,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023713094] [2021-04-15 04:43:44,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:44,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:44,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:44,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:44,732 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 04:43:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:44,785 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-04-15 04:43:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:43:44,786 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 04:43:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:44,794 INFO L225 Difference]: With dead ends: 1524 [2021-04-15 04:43:44,794 INFO L226 Difference]: Without dead ends: 1418 [2021-04-15 04:43:44,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-04-15 04:43:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-04-15 04:43:44,825 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 04:43:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-04-15 04:43:44,830 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-04-15 04:43:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:44,830 INFO L480 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-04-15 04:43:44,830 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 04:43:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-04-15 04:43:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 04:43:44,833 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:44,833 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 04:43:44,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 04:43:44,834 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-04-15 04:43:44,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:44,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463738228] [2021-04-15 04:43:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:44,867 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 04:43:44,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463738228] [2021-04-15 04:43:44,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:43:44,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:43:44,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076734713] [2021-04-15 04:43:44,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:44,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:44,869 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 04:43:44,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:44,906 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-04-15 04:43:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:43:44,907 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 04:43:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:44,916 INFO L225 Difference]: With dead ends: 2017 [2021-04-15 04:43:44,916 INFO L226 Difference]: Without dead ends: 1875 [2021-04-15 04:43:44,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-04-15 04:43:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-04-15 04:43:44,968 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 04:43:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-04-15 04:43:44,975 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-04-15 04:43:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:44,979 INFO L480 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-04-15 04:43:44,979 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 04:43:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-04-15 04:43:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:43:44,984 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:44,984 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 04:43:44,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 04:43:44,984 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:44,985 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-04-15 04:43:44,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:44,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494335213] [2021-04-15 04:43:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:45,049 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 04:43:45,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494335213] [2021-04-15 04:43:45,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100720281] [2021-04-15 04:43:45,049 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 04:43:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:45,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:43:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:45,276 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 04:43:45,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:45,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-04-15 04:43:45,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392796389] [2021-04-15 04:43:45,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:43:45,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:43:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:43:45,278 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 04:43:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:45,388 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-04-15 04:43:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:43:45,389 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 04:43:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:45,399 INFO L225 Difference]: With dead ends: 2308 [2021-04-15 04:43:45,399 INFO L226 Difference]: Without dead ends: 2108 [2021-04-15 04:43:45,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:43:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-04-15 04:43:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-04-15 04:43:45,440 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 04:43:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-04-15 04:43:45,446 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-04-15 04:43:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:45,446 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-04-15 04:43:45,446 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 04:43:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-04-15 04:43:45,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:43:45,449 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:45,449 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 04:43:45,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:45,666 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:45,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1080968406, now seen corresponding path program 1 times [2021-04-15 04:43:45,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:45,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561803055] [2021-04-15 04:43:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:45,685 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 04:43:45,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561803055] [2021-04-15 04:43:45,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:43:45,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:43:45,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996132583] [2021-04-15 04:43:45,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:45,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:45,687 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 04:43:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:45,766 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-04-15 04:43:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:43:45,767 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 04:43:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:45,776 INFO L225 Difference]: With dead ends: 1950 [2021-04-15 04:43:45,776 INFO L226 Difference]: Without dead ends: 1860 [2021-04-15 04:43:45,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:43:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-04-15 04:43:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-04-15 04:43:45,814 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 04:43:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-04-15 04:43:45,819 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-04-15 04:43:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:45,819 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-04-15 04:43:45,819 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 04:43:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-04-15 04:43:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:43:45,823 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:45,823 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 04:43:45,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 04:43:45,823 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1489193046, now seen corresponding path program 2 times [2021-04-15 04:43:45,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:45,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445761235] [2021-04-15 04:43:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:45,841 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 04:43:45,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445761235] [2021-04-15 04:43:45,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:43:45,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:43:45,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815428862] [2021-04-15 04:43:45,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:45,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:45,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:45,842 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 04:43:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:45,893 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-04-15 04:43:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:43:45,893 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 04:43:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:45,900 INFO L225 Difference]: With dead ends: 1308 [2021-04-15 04:43:45,900 INFO L226 Difference]: Without dead ends: 1308 [2021-04-15 04:43:45,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 04:43:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-04-15 04:43:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-04-15 04:43:45,922 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 04:43:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-04-15 04:43:45,926 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-04-15 04:43:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:45,928 INFO L480 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-04-15 04:43:45,928 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 04:43:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-04-15 04:43:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 04:43:45,931 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:45,931 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 04:43:45,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 04:43:45,933 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:45,939 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-04-15 04:43:45,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:45,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204273872] [2021-04-15 04:43:45,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:45,980 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 04:43:45,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204273872] [2021-04-15 04:43:45,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:43:45,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:43:45,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587398625] [2021-04-15 04:43:45,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:45,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:45,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:45,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 04:43:45,982 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 04:43:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:46,017 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-04-15 04:43:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:43:46,017 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 04:43:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:46,022 INFO L225 Difference]: With dead ends: 1142 [2021-04-15 04:43:46,022 INFO L226 Difference]: Without dead ends: 1120 [2021-04-15 04:43:46,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:43:46,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-04-15 04:43:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-04-15 04:43:46,043 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 04:43:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-04-15 04:43:46,047 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-04-15 04:43:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:46,047 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-04-15 04:43:46,047 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 04:43:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-04-15 04:43:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 04:43:46,050 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:46,050 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 04:43:46,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 04:43:46,050 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:46,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1861969590, now seen corresponding path program 1 times [2021-04-15 04:43:46,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:46,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724783456] [2021-04-15 04:43:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:46,097 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 04:43:46,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724783456] [2021-04-15 04:43:46,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920443454] [2021-04-15 04:43:46,097 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 04:43:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 04:43:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:46,209 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 04:43:46,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 04:43:46,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-04-15 04:43:46,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964829102] [2021-04-15 04:43:46,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:46,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:43:46,211 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 04:43:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:46,227 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-04-15 04:43:46,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:43:46,227 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 04:43:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:46,233 INFO L225 Difference]: With dead ends: 1344 [2021-04-15 04:43:46,234 INFO L226 Difference]: Without dead ends: 1344 [2021-04-15 04:43:46,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:43:46,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-04-15 04:43:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-04-15 04:43:46,252 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 04:43:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-04-15 04:43:46,255 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-04-15 04:43:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:46,255 INFO L480 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-04-15 04:43:46,255 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 04:43:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-04-15 04:43:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-04-15 04:43:46,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:46,257 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 04:43:46,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:46,473 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:46,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1282023498, now seen corresponding path program 1 times [2021-04-15 04:43:46,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:46,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417125058] [2021-04-15 04:43:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:46,497 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 04:43:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417125058] [2021-04-15 04:43:46,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600074164] [2021-04-15 04:43:46,499 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 04:43:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 04:43:46,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:46,569 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 04:43:46,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 04:43:46,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-04-15 04:43:46,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283026442] [2021-04-15 04:43:46,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 04:43:46,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 04:43:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:43:46,570 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 04:43:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:46,587 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-04-15 04:43:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:43:46,588 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 04:43:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:46,606 INFO L225 Difference]: With dead ends: 1608 [2021-04-15 04:43:46,606 INFO L226 Difference]: Without dead ends: 1608 [2021-04-15 04:43:46,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:43:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-04-15 04:43:46,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-04-15 04:43:46,630 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 04:43:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-04-15 04:43:46,633 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-04-15 04:43:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:46,633 INFO L480 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-04-15 04:43:46,633 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 04:43:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-04-15 04:43:46,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:43:46,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:46,635 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 04:43:46,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:46,855 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 1 times [2021-04-15 04:43:46,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:46,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189452998] [2021-04-15 04:43:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:47,012 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 04:43:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189452998] [2021-04-15 04:43:47,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689455789] [2021-04-15 04:43:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:43:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:43:47,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:47,140 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 04:43:47,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:47,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:47,146 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 04:43:47,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-04-15 04:43:47,169 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 04:43:47,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:47,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:47,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:47,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-04-15 04:43:47,210 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 04:43:47,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:47,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:43:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979595354] [2021-04-15 04:43:47,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:43:47,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:43:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:43:47,212 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 04:43:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:47,365 INFO L93 Difference]: Finished difference Result 2449 states and 9125 transitions. [2021-04-15 04:43:47,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:43:47,365 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 04:43:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:47,372 INFO L225 Difference]: With dead ends: 2449 [2021-04-15 04:43:47,372 INFO L226 Difference]: Without dead ends: 2370 [2021-04-15 04:43:47,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:43:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-04-15 04:43:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1512. [2021-04-15 04:43:47,416 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 04:43:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5601 transitions. [2021-04-15 04:43:47,421 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5601 transitions. Word has length 29 [2021-04-15 04:43:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:47,422 INFO L480 AbstractCegarLoop]: Abstraction has 1512 states and 5601 transitions. [2021-04-15 04:43:47,422 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 04:43:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5601 transitions. [2021-04-15 04:43:47,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:43:47,426 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:47,426 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 04:43:47,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:47,644 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash -53868170, now seen corresponding path program 2 times [2021-04-15 04:43:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:47,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440595871] [2021-04-15 04:43:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:47,753 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 04:43:47,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440595871] [2021-04-15 04:43:47,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148676009] [2021-04-15 04:43:47,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:43:47,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:43:47,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:47,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:43:47,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:47,829 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 04:43:47,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:47,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:47,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:47,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:43:47,850 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 04:43:47,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:47,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:47,852 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 04:43:47,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:43:47,887 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 04:43:47,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:47,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:43:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881628396] [2021-04-15 04:43:47,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:43:47,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:47,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:43:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:43:47,889 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 04:43:48,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:48,056 INFO L93 Difference]: Finished difference Result 2849 states and 10712 transitions. [2021-04-15 04:43:48,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:43:48,056 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 04:43:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:48,065 INFO L225 Difference]: With dead ends: 2849 [2021-04-15 04:43:48,065 INFO L226 Difference]: Without dead ends: 2770 [2021-04-15 04:43:48,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:43:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-04-15 04:43:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1711. [2021-04-15 04:43:48,102 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 04:43:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 6368 transitions. [2021-04-15 04:43:48,106 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 6368 transitions. Word has length 29 [2021-04-15 04:43:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:48,107 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 6368 transitions. [2021-04-15 04:43:48,107 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 04:43:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 6368 transitions. [2021-04-15 04:43:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:43:48,111 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:48,111 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 04:43:48,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-04-15 04:43:48,318 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:48,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:48,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1931624520, now seen corresponding path program 3 times [2021-04-15 04:43:48,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:48,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602696538] [2021-04-15 04:43:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:48,420 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 04:43:48,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602696538] [2021-04-15 04:43:48,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545841937] [2021-04-15 04:43:48,420 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 04:43:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:43:48,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:43:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:48,505 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 04:43:48,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:48,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:43:48,579 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 04:43:48,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:48,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:48,582 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 04:43:48,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:43:48,603 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 04:43:48,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:48,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:43:48,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008877521] [2021-04-15 04:43:48,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:43:48,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:48,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:43:48,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:43:48,604 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 04:43:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:48,764 INFO L93 Difference]: Finished difference Result 2677 states and 10034 transitions. [2021-04-15 04:43:48,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:43:48,765 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 04:43:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:48,773 INFO L225 Difference]: With dead ends: 2677 [2021-04-15 04:43:48,773 INFO L226 Difference]: Without dead ends: 2598 [2021-04-15 04:43:48,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:43:48,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-04-15 04:43:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1837. [2021-04-15 04:43:48,807 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 04:43:48,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-04-15 04:43:48,812 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-04-15 04:43:48,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:48,813 INFO L480 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-04-15 04:43:48,813 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 04:43:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-04-15 04:43:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:43:48,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:48,817 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 04:43:49,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:49,032 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:49,033 INFO L82 PathProgramCache]: Analyzing trace with hash 490207522, now seen corresponding path program 4 times [2021-04-15 04:43:49,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:49,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993576380] [2021-04-15 04:43:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:49,149 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 04:43:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993576380] [2021-04-15 04:43:49,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037164355] [2021-04-15 04:43:49,150 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 04:43:49,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:43:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:49,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:43:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:49,221 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 04:43:49,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:49,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:49,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:49,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:43:49,243 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 04:43:49,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:49,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:49,246 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 04:43:49,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:43:49,283 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 04:43:49,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:49,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:43:49,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272289119] [2021-04-15 04:43:49,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:43:49,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:49,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:43:49,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:43:49,285 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 04:43:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:49,507 INFO L93 Difference]: Finished difference Result 3111 states and 11725 transitions. [2021-04-15 04:43:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:43:49,508 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 04:43:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:49,518 INFO L225 Difference]: With dead ends: 3111 [2021-04-15 04:43:49,518 INFO L226 Difference]: Without dead ends: 3032 [2021-04-15 04:43:49,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:43:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-04-15 04:43:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2051. [2021-04-15 04:43:49,559 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 04:43:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-04-15 04:43:49,565 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-04-15 04:43:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:49,565 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-04-15 04:43:49,565 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 04:43:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-04-15 04:43:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:43:49,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:49,569 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 04:43:49,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:49,785 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -464930448, now seen corresponding path program 5 times [2021-04-15 04:43:49,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:49,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331447793] [2021-04-15 04:43:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:49,889 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 04:43:49,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331447793] [2021-04-15 04:43:49,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660326719] [2021-04-15 04:43:49,889 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 04:43:49,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:43:49,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:43:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:49,977 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 04:43:49,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:49,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:49,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:49,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-04-15 04:43:50,040 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 04:43:50,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:50,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:50,043 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 04:43:50,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-04-15 04:43:50,070 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 04:43:50,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:50,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:43:50,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633589380] [2021-04-15 04:43:50,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:43:50,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:50,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:43:50,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:43:50,071 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 04:43:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:50,255 INFO L93 Difference]: Finished difference Result 2933 states and 11023 transitions. [2021-04-15 04:43:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 04:43:50,256 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 04:43:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:50,263 INFO L225 Difference]: With dead ends: 2933 [2021-04-15 04:43:50,263 INFO L226 Difference]: Without dead ends: 2854 [2021-04-15 04:43:50,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:43:50,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-04-15 04:43:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 1852. [2021-04-15 04:43:50,297 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 04:43:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-04-15 04:43:50,302 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-04-15 04:43:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:50,303 INFO L480 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-04-15 04:43:50,303 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 04:43:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-04-15 04:43:50,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:43:50,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:50,306 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 04:43:50,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 04:43:50,521 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1689459718, now seen corresponding path program 6 times [2021-04-15 04:43:50,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:50,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629066257] [2021-04-15 04:43:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:50,642 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 04:43:50,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629066257] [2021-04-15 04:43:50,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367057972] [2021-04-15 04:43:50,642 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 04:43:50,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:43:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:50,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 04:43:50,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:50,740 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 04:43:50,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:50,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:50,745 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 04:43:50,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-04-15 04:43:50,765 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 04:43:50,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:43:50,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:43:50,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:43:50,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-04-15 04:43:50,796 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 04:43:50,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:50,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-04-15 04:43:50,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370101982] [2021-04-15 04:43:50,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:43:50,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:50,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:43:50,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:43:50,798 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 04:43:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:50,962 INFO L93 Difference]: Finished difference Result 2807 states and 10501 transitions. [2021-04-15 04:43:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:43:50,963 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 04:43:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:50,972 INFO L225 Difference]: With dead ends: 2807 [2021-04-15 04:43:50,972 INFO L226 Difference]: Without dead ends: 2728 [2021-04-15 04:43:50,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:43:50,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-04-15 04:43:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1892. [2021-04-15 04:43:51,010 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 04:43:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-04-15 04:43:51,015 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-04-15 04:43:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:51,015 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-04-15 04:43:51,015 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 04:43:51,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-04-15 04:43:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 04:43:51,019 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:51,019 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 04:43:51,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 04:43:51,235 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1599438650, now seen corresponding path program 7 times [2021-04-15 04:43:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:51,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35622894] [2021-04-15 04:43:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:51,258 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 04:43:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35622894] [2021-04-15 04:43:51,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472026747] [2021-04-15 04:43:51,259 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 04:43:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:51,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:43:51,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:51,342 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 04:43:51,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:51,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-04-15 04:43:51,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788369372] [2021-04-15 04:43:51,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:43:51,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:51,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:43:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:43:51,343 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 04:43:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:51,400 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-04-15 04:43:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:43:51,400 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 04:43:51,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:51,409 INFO L225 Difference]: With dead ends: 3393 [2021-04-15 04:43:51,409 INFO L226 Difference]: Without dead ends: 3242 [2021-04-15 04:43:51,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:43:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-04-15 04:43:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-04-15 04:43:51,490 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 04:43:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-04-15 04:43:51,498 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-04-15 04:43:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:51,498 INFO L480 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-04-15 04:43:51,499 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 04:43:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-04-15 04:43:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 04:43:51,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:51,504 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 04:43:51,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 04:43:51,712 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:51,712 INFO L82 PathProgramCache]: Analyzing trace with hash 415909830, now seen corresponding path program 8 times [2021-04-15 04:43:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577233994] [2021-04-15 04:43:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:51,748 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 04:43:51,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577233994] [2021-04-15 04:43:51,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297075783] [2021-04-15 04:43:51,749 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 04:43:51,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:43:51,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:51,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 04:43:51,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:51,830 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 04:43:51,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:51,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-04-15 04:43:51,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090710435] [2021-04-15 04:43:51,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:43:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:43:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:43:51,832 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 04:43:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:51,906 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-04-15 04:43:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 04:43:51,907 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 04:43:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:51,921 INFO L225 Difference]: With dead ends: 5257 [2021-04-15 04:43:51,921 INFO L226 Difference]: Without dead ends: 5006 [2021-04-15 04:43:51,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:43:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-04-15 04:43:51,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-04-15 04:43:51,993 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 04:43:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-04-15 04:43:52,004 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-04-15 04:43:52,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:52,005 INFO L480 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-04-15 04:43:52,005 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 04:43:52,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-04-15 04:43:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:52,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:52,014 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 04:43:52,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 04:43:52,223 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:52,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:52,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1135351718, now seen corresponding path program 9 times [2021-04-15 04:43:52,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:52,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008613205] [2021-04-15 04:43:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:52,250 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 04:43:52,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008613205] [2021-04-15 04:43:52,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290736004] [2021-04-15 04:43:52,250 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 04:43:52,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:43:52,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:52,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:52,346 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 04:43:52,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:52,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 04:43:52,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030858729] [2021-04-15 04:43:52,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:43:52,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:43:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:43:52,347 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 04:43:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:52,634 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-04-15 04:43:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:43:52,635 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 04:43:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:52,712 INFO L225 Difference]: With dead ends: 16323 [2021-04-15 04:43:52,712 INFO L226 Difference]: Without dead ends: 13965 [2021-04-15 04:43:52,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:43:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-04-15 04:43:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-04-15 04:43:52,894 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 04:43:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-04-15 04:43:52,918 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-04-15 04:43:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:52,918 INFO L480 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-04-15 04:43:52,918 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 04:43:52,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-04-15 04:43:52,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:52,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:52,933 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 04:43:53,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 04:43:53,149 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:53,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1002610221, now seen corresponding path program 10 times [2021-04-15 04:43:53,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:53,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895949049] [2021-04-15 04:43:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:53,184 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 04:43:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895949049] [2021-04-15 04:43:53,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855309054] [2021-04-15 04:43:53,184 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 04:43:53,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:43:53,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:53,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:53,334 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 04:43:53,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:53,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 04:43:53,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048758025] [2021-04-15 04:43:53,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:43:53,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:53,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:43:53,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:43:53,335 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 04:43:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:53,637 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-04-15 04:43:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:43:53,638 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 04:43:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:53,682 INFO L225 Difference]: With dead ends: 18970 [2021-04-15 04:43:53,683 INFO L226 Difference]: Without dead ends: 18531 [2021-04-15 04:43:53,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:43:53,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-04-15 04:43:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-04-15 04:43:53,984 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 04:43:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-04-15 04:43:54,018 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-04-15 04:43:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:54,019 INFO L480 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-04-15 04:43:54,019 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 04:43:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-04-15 04:43:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:54,042 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:54,042 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 04:43:54,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:54,257 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 614978514, now seen corresponding path program 11 times [2021-04-15 04:43:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:54,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140971198] [2021-04-15 04:43:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:54,280 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 04:43:54,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140971198] [2021-04-15 04:43:54,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293542980] [2021-04-15 04:43:54,280 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 04:43:54,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:43:54,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:54,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:54,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:54,383 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 04:43:54,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:54,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:43:54,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559408467] [2021-04-15 04:43:54,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:43:54,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:54,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:43:54,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:43:54,385 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 04:43:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:54,621 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-04-15 04:43:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:43:54,621 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 04:43:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:54,754 INFO L225 Difference]: With dead ends: 18432 [2021-04-15 04:43:54,754 INFO L226 Difference]: Without dead ends: 18354 [2021-04-15 04:43:54,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:43:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-04-15 04:43:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-04-15 04:43:55,083 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 04:43:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-04-15 04:43:55,118 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-04-15 04:43:55,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:55,118 INFO L480 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-04-15 04:43:55,118 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 04:43:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-04-15 04:43:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:55,141 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:55,141 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 04:43:55,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:55,354 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash 307309967, now seen corresponding path program 12 times [2021-04-15 04:43:55,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:55,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555122643] [2021-04-15 04:43:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:55,380 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 04:43:55,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555122643] [2021-04-15 04:43:55,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004777398] [2021-04-15 04:43:55,380 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 04:43:55,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:43:55,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:55,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:55,486 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 04:43:55,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:55,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:43:55,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921927114] [2021-04-15 04:43:55,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:43:55,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:43:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:43:55,488 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 04:43:55,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:55,821 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-04-15 04:43:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:43:55,821 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 04:43:55,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:55,874 INFO L225 Difference]: With dead ends: 20371 [2021-04-15 04:43:55,874 INFO L226 Difference]: Without dead ends: 18706 [2021-04-15 04:43:55,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:43:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-04-15 04:43:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-04-15 04:43:56,233 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 04:43:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-04-15 04:43:56,279 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-04-15 04:43:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:56,280 INFO L480 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-04-15 04:43:56,280 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 04:43:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-04-15 04:43:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:56,385 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:56,385 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 04:43:56,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 04:43:56,599 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash -749871114, now seen corresponding path program 13 times [2021-04-15 04:43:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:56,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108899977] [2021-04-15 04:43:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:56,640 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 04:43:56,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108899977] [2021-04-15 04:43:56,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406516191] [2021-04-15 04:43:56,641 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 04:43:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:56,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:56,733 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 04:43:56,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:56,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:43:56,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185467117] [2021-04-15 04:43:56,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:43:56,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:43:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:43:56,734 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 04:43:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:57,086 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-04-15 04:43:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:43:57,086 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 04:43:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:57,159 INFO L225 Difference]: With dead ends: 29290 [2021-04-15 04:43:57,159 INFO L226 Difference]: Without dead ends: 27668 [2021-04-15 04:43:57,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:43:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-04-15 04:43:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-04-15 04:43:57,654 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 04:43:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-04-15 04:43:57,712 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-04-15 04:43:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:57,712 INFO L480 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-04-15 04:43:57,712 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 04:43:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-04-15 04:43:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:57,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:57,745 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 04:43:57,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:43:57,946 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1681290952, now seen corresponding path program 14 times [2021-04-15 04:43:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:57,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952013111] [2021-04-15 04:43:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:57,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:57,966 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 04:43:57,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952013111] [2021-04-15 04:43:57,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129601418] [2021-04-15 04:43:57,967 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 04:43:57,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:43:57,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:58,064 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 04:43:58,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:58,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:43:58,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704348834] [2021-04-15 04:43:58,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:43:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:43:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:43:58,066 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 04:43:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:58,471 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-04-15 04:43:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:43:58,472 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 04:43:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:58,541 INFO L225 Difference]: With dead ends: 27112 [2021-04-15 04:43:58,541 INFO L226 Difference]: Without dead ends: 26976 [2021-04-15 04:43:58,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:43:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-04-15 04:43:58,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-04-15 04:43:58,958 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 04:43:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-04-15 04:43:59,006 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-04-15 04:43:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:43:59,006 INFO L480 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-04-15 04:43:59,006 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 04:43:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-04-15 04:43:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:43:59,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:43:59,039 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 04:43:59,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 04:43:59,245 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:43:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:43:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1329276436, now seen corresponding path program 15 times [2021-04-15 04:43:59,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:43:59,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550802454] [2021-04-15 04:43:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:43:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:43:59,270 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 04:43:59,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550802454] [2021-04-15 04:43:59,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754276838] [2021-04-15 04:43:59,271 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 04:43:59,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:43:59,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:43:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:43:59,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:43:59,363 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 04:43:59,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:43:59,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-04-15 04:43:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335774455] [2021-04-15 04:43:59,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 04:43:59,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:43:59,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 04:43:59,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 04:43:59,364 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 04:43:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:43:59,789 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-04-15 04:43:59,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:43:59,789 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 04:43:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:43:59,870 INFO L225 Difference]: With dead ends: 30228 [2021-04-15 04:43:59,870 INFO L226 Difference]: Without dead ends: 30070 [2021-04-15 04:43:59,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:43:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-04-15 04:44:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-04-15 04:44:00,430 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 04:44:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-04-15 04:44:00,503 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-04-15 04:44:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:00,503 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-04-15 04:44:00,504 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 04:44:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-04-15 04:44:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 04:44:00,546 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:00,546 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 04:44:00,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 04:44:00,746 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:00,747 INFO L82 PathProgramCache]: Analyzing trace with hash 190972073, now seen corresponding path program 16 times [2021-04-15 04:44:00,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:00,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756094468] [2021-04-15 04:44:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:00,771 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 04:44:00,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756094468] [2021-04-15 04:44:00,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435621246] [2021-04-15 04:44:00,772 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 04:44:00,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:44:00,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:00,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:44:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:00,886 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 04:44:00,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:00,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-04-15 04:44:00,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609021735] [2021-04-15 04:44:00,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 04:44:00,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:00,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 04:44:00,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 04:44:00,887 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 04:44:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:01,321 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-04-15 04:44:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:44:01,321 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 04:44:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:01,398 INFO L225 Difference]: With dead ends: 28338 [2021-04-15 04:44:01,399 INFO L226 Difference]: Without dead ends: 28230 [2021-04-15 04:44:01,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:44:01,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-04-15 04:44:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-04-15 04:44:01,875 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 04:44:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-04-15 04:44:01,951 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-04-15 04:44:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:01,951 INFO L480 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-04-15 04:44:01,951 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 04:44:01,951 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-04-15 04:44:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 04:44:01,993 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:01,993 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 04:44:02,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 04:44:02,194 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash 832677239, now seen corresponding path program 17 times [2021-04-15 04:44:02,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:02,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109750069] [2021-04-15 04:44:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:02,211 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 04:44:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109750069] [2021-04-15 04:44:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165440696] [2021-04-15 04:44:02,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:44:02,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:44:02,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:44:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:02,281 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 04:44:02,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:02,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 04:44:02,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459445696] [2021-04-15 04:44:02,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:44:02,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:02,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:44:02,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:44:02,282 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 04:44:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:02,415 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-04-15 04:44:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:44:02,416 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 04:44:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:02,653 INFO L225 Difference]: With dead ends: 29898 [2021-04-15 04:44:02,653 INFO L226 Difference]: Without dead ends: 29898 [2021-04-15 04:44:02,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:44:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-04-15 04:44:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-04-15 04:44:02,996 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 04:44:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-04-15 04:44:03,241 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-04-15 04:44:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:03,241 INFO L480 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-04-15 04:44:03,241 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 04:44:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-04-15 04:44:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 04:44:03,282 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:03,282 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 04:44:03,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 04:44:03,482 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:03,483 INFO L82 PathProgramCache]: Analyzing trace with hash -97394957, now seen corresponding path program 18 times [2021-04-15 04:44:03,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:03,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802775419] [2021-04-15 04:44:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:03,501 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 04:44:03,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802775419] [2021-04-15 04:44:03,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713497155] [2021-04-15 04:44:03,501 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 04:44:03,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:44:03,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:03,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 04:44:03,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:03,582 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 04:44:03,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:03,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 04:44:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406416079] [2021-04-15 04:44:03,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:44:03,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:44:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:44:03,583 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 04:44:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:03,789 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-04-15 04:44:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:44:03,790 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 04:44:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:03,892 INFO L225 Difference]: With dead ends: 37062 [2021-04-15 04:44:03,892 INFO L226 Difference]: Without dead ends: 37062 [2021-04-15 04:44:03,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:44:03,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-04-15 04:44:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-04-15 04:44:04,656 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 04:44:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-04-15 04:44:04,765 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-04-15 04:44:04,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:04,765 INFO L480 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-04-15 04:44:04,765 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 04:44:04,765 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-04-15 04:44:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:04,830 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:04,830 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 04:44:05,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 04:44:05,033 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:05,033 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 19 times [2021-04-15 04:44:05,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:05,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074007872] [2021-04-15 04:44:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:05,432 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-04-15 04:44:05,578 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 04:44:05,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074007872] [2021-04-15 04:44:05,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239190804] [2021-04-15 04:44:05,578 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 04:44:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:05,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:05,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:05,758 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 04:44:05,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:05,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:05,764 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 04:44:05,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:44:05,841 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 04:44:05,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:05,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:05,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:05,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-04-15 04:44:05,886 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 04:44:05,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:05,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:44:05,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816849560] [2021-04-15 04:44:05,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:44:05,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:44:05,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:44:05,887 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 04:44:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:07,274 INFO L93 Difference]: Finished difference Result 68650 states and 282459 transitions. [2021-04-15 04:44:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:44:07,274 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 04:44:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:07,502 INFO L225 Difference]: With dead ends: 68650 [2021-04-15 04:44:07,502 INFO L226 Difference]: Without dead ends: 68595 [2021-04-15 04:44:07,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 966.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:44:07,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68595 states. [2021-04-15 04:44:08,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68595 to 35386. [2021-04-15 04:44:08,479 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 04:44:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35386 states to 35386 states and 146541 transitions. [2021-04-15 04:44:08,602 INFO L78 Accepts]: Start accepts. Automaton has 35386 states and 146541 transitions. Word has length 39 [2021-04-15 04:44:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:08,602 INFO L480 AbstractCegarLoop]: Abstraction has 35386 states and 146541 transitions. [2021-04-15 04:44:08,602 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 04:44:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 35386 states and 146541 transitions. [2021-04-15 04:44:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:08,668 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:08,668 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 04:44:08,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:08,869 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:08,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:08,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 20 times [2021-04-15 04:44:08,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:08,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404241811] [2021-04-15 04:44:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:09,423 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 04:44:09,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404241811] [2021-04-15 04:44:09,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227524847] [2021-04-15 04:44:09,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:44:09,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:44:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:09,581 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:09,581 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 04:44:09,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:09,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:09,587 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 04:44:09,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:44:09,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:44:09,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:09,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:09,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:09,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:09,746 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 04:44:09,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:09,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:09,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560568549] [2021-04-15 04:44:09,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:09,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:09,747 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 04:44:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:11,725 INFO L93 Difference]: Finished difference Result 63622 states and 260156 transitions. [2021-04-15 04:44:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:44:11,725 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 04:44:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:11,921 INFO L225 Difference]: With dead ends: 63622 [2021-04-15 04:44:11,921 INFO L226 Difference]: Without dead ends: 63406 [2021-04-15 04:44:11,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1429.6ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:44:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63406 states. [2021-04-15 04:44:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63406 to 35493. [2021-04-15 04:44:12,807 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 04:44:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35493 states to 35493 states and 147077 transitions. [2021-04-15 04:44:12,917 INFO L78 Accepts]: Start accepts. Automaton has 35493 states and 147077 transitions. Word has length 39 [2021-04-15 04:44:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:12,917 INFO L480 AbstractCegarLoop]: Abstraction has 35493 states and 147077 transitions. [2021-04-15 04:44:12,917 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 04:44:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 35493 states and 147077 transitions. [2021-04-15 04:44:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:12,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:12,983 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 04:44:13,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 04:44:13,183 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 21 times [2021-04-15 04:44:13,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:13,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685374232] [2021-04-15 04:44:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:13,601 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-04-15 04:44:13,718 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 04:44:13,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685374232] [2021-04-15 04:44:13,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084884595] [2021-04-15 04:44:13,718 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 04:44:13,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:44:13,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:44:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:13,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:13,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 04:44:13,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:13,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:13,975 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 04:44:13,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:81 [2021-04-15 04:44:14,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:14,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:44:14,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:14,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:14,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:14,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-04-15 04:44:14,318 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 04:44:14,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:14,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:44:14,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660739334] [2021-04-15 04:44:14,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:44:14,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:14,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:44:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:44:14,320 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 04:44:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:16,570 INFO L93 Difference]: Finished difference Result 59288 states and 241076 transitions. [2021-04-15 04:44:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:44:16,570 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 04:44:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:16,737 INFO L225 Difference]: With dead ends: 59288 [2021-04-15 04:44:16,737 INFO L226 Difference]: Without dead ends: 59124 [2021-04-15 04:44:16,738 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1635.4ms TimeCoverageRelationStatistics Valid=530, Invalid=2020, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:44:16,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59124 states. [2021-04-15 04:44:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59124 to 35683. [2021-04-15 04:44:17,572 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 04:44:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35683 states to 35683 states and 147745 transitions. [2021-04-15 04:44:17,679 INFO L78 Accepts]: Start accepts. Automaton has 35683 states and 147745 transitions. Word has length 39 [2021-04-15 04:44:17,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:17,679 INFO L480 AbstractCegarLoop]: Abstraction has 35683 states and 147745 transitions. [2021-04-15 04:44:17,679 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 04:44:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 35683 states and 147745 transitions. [2021-04-15 04:44:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:17,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:17,745 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 04:44:17,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:17,945 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:17,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:17,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1267064945, now seen corresponding path program 22 times [2021-04-15 04:44:17,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:17,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214094117] [2021-04-15 04:44:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:18,297 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 04:44:18,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214094117] [2021-04-15 04:44:18,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205396950] [2021-04-15 04:44:18,297 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 04:44:18,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:44:18,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:18,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:18,454 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:18,454 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 04:44:18,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:18,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:18,460 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 04:44:18,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:44:18,574 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 04:44:18,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:18,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:18,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:18,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:18,622 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 04:44:18,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:18,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:18,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748069721] [2021-04-15 04:44:18,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:18,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:18,623 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 04:44:18,870 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-04-15 04:44:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:20,900 INFO L93 Difference]: Finished difference Result 76962 states and 312761 transitions. [2021-04-15 04:44:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:44:20,901 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 04:44:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:21,139 INFO L225 Difference]: With dead ends: 76962 [2021-04-15 04:44:21,140 INFO L226 Difference]: Without dead ends: 76778 [2021-04-15 04:44:21,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1279.5ms TimeCoverageRelationStatistics Valid=358, Invalid=1804, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:44:21,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76778 states. [2021-04-15 04:44:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76778 to 35521. [2021-04-15 04:44:22,178 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 04:44:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35521 states to 35521 states and 147171 transitions. [2021-04-15 04:44:22,307 INFO L78 Accepts]: Start accepts. Automaton has 35521 states and 147171 transitions. Word has length 39 [2021-04-15 04:44:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:22,307 INFO L480 AbstractCegarLoop]: Abstraction has 35521 states and 147171 transitions. [2021-04-15 04:44:22,308 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 04:44:22,308 INFO L276 IsEmpty]: Start isEmpty. Operand 35521 states and 147171 transitions. [2021-04-15 04:44:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:22,382 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:22,383 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 04:44:22,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 04:44:22,594 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 23 times [2021-04-15 04:44:22,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:22,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369676592] [2021-04-15 04:44:22,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:22,909 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 04:44:22,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369676592] [2021-04-15 04:44:22,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460124660] [2021-04-15 04:44:22,909 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 04:44:22,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:44:22,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:22,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:23,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:23,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:23,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-04-15 04:44:23,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:44:23,155 INFO L628 ElimStorePlain]: treesize reduction 22, result has 66.7 percent of original size [2021-04-15 04:44:23,159 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 04:44:23,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-04-15 04:44:23,260 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 04:44:23,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:23,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:23,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:23,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:44:23,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:23,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2021-04-15 04:44:23,362 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 04:44:23,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:23,368 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 04:44:23,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-04-15 04:44:23,384 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 04:44:23,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:23,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:44:23,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055587280] [2021-04-15 04:44:23,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:44:23,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:23,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:44:23,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:44:23,386 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 04:44:23,752 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-04-15 04:44:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:26,063 INFO L93 Difference]: Finished difference Result 62455 states and 255118 transitions. [2021-04-15 04:44:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:44:26,063 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 04:44:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:26,248 INFO L225 Difference]: With dead ends: 62455 [2021-04-15 04:44:26,249 INFO L226 Difference]: Without dead ends: 62400 [2021-04-15 04:44:26,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=290, Invalid=2362, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:44:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62400 states. [2021-04-15 04:44:27,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62400 to 36126. [2021-04-15 04:44:27,146 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 04:44:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36126 states to 36126 states and 149558 transitions. [2021-04-15 04:44:27,262 INFO L78 Accepts]: Start accepts. Automaton has 36126 states and 149558 transitions. Word has length 39 [2021-04-15 04:44:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:27,262 INFO L480 AbstractCegarLoop]: Abstraction has 36126 states and 149558 transitions. [2021-04-15 04:44:27,262 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 04:44:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36126 states and 149558 transitions. [2021-04-15 04:44:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:27,327 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:27,327 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 04:44:27,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 04:44:27,528 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 24 times [2021-04-15 04:44:27,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:27,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952637222] [2021-04-15 04:44:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:27,858 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 04:44:27,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952637222] [2021-04-15 04:44:27,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411472466] [2021-04-15 04:44:27,859 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 04:44:27,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:44:27,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:44:27,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:28,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:28,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-04-15 04:44:28,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:28,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:28,102 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 04:44:28,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-04-15 04:44:28,228 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 04:44:28,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:28,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:28,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:28,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:28,282 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 04:44:28,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:28,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:44:28,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356006759] [2021-04-15 04:44:28,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:44:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:44:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:44:28,283 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 04:44:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:30,618 INFO L93 Difference]: Finished difference Result 62047 states and 253181 transitions. [2021-04-15 04:44:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 04:44:30,618 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 04:44:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:30,990 INFO L225 Difference]: With dead ends: 62047 [2021-04-15 04:44:30,990 INFO L226 Difference]: Without dead ends: 61919 [2021-04-15 04:44:30,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1594.7ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 04:44:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61919 states. [2021-04-15 04:44:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61919 to 36244. [2021-04-15 04:44:31,729 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 04:44:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36244 states to 36244 states and 149990 transitions. [2021-04-15 04:44:32,102 INFO L78 Accepts]: Start accepts. Automaton has 36244 states and 149990 transitions. Word has length 39 [2021-04-15 04:44:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:32,102 INFO L480 AbstractCegarLoop]: Abstraction has 36244 states and 149990 transitions. [2021-04-15 04:44:32,102 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 04:44:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 36244 states and 149990 transitions. [2021-04-15 04:44:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:32,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:32,173 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 04:44:32,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 04:44:32,374 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 25 times [2021-04-15 04:44:32,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:32,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83767035] [2021-04-15 04:44:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:32,708 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 04:44:32,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83767035] [2021-04-15 04:44:32,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493642242] [2021-04-15 04:44:32,708 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 04:44:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:32,892 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:32,893 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 04:44:32,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:32,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:32,901 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 04:44:32,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:44:32,992 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 04:44:32,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:32,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:32,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:32,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:33,038 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 04:44:33,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:33,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474982498] [2021-04-15 04:44:33,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:33,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:33,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:33,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:33,039 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 04:44:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:34,718 INFO L93 Difference]: Finished difference Result 63583 states and 260022 transitions. [2021-04-15 04:44:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:44:34,718 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 04:44:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:34,907 INFO L225 Difference]: With dead ends: 63583 [2021-04-15 04:44:34,907 INFO L226 Difference]: Without dead ends: 63391 [2021-04-15 04:44:34,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1151.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1423, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:44:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63391 states. [2021-04-15 04:44:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63391 to 36222. [2021-04-15 04:44:35,879 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 04:44:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36222 states to 36222 states and 149919 transitions. [2021-04-15 04:44:35,999 INFO L78 Accepts]: Start accepts. Automaton has 36222 states and 149919 transitions. Word has length 39 [2021-04-15 04:44:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:36,000 INFO L480 AbstractCegarLoop]: Abstraction has 36222 states and 149919 transitions. [2021-04-15 04:44:36,000 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 04:44:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 36222 states and 149919 transitions. [2021-04-15 04:44:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:36,070 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:36,070 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 04:44:36,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:36,273 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash 337270923, now seen corresponding path program 26 times [2021-04-15 04:44:36,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:36,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820353917] [2021-04-15 04:44:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:36,561 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 04:44:36,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820353917] [2021-04-15 04:44:36,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972524199] [2021-04-15 04:44:36,562 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 04:44:36,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:44:36,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:36,756 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:36,756 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 04:44:36,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:36,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:36,764 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 04:44:36,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:44:36,819 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 04:44:36,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:36,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:36,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:36,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-04-15 04:44:36,889 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 04:44:36,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:36,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:36,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433799054] [2021-04-15 04:44:36,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:36,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:36,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:36,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:36,890 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 04:44:39,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:39,200 INFO L93 Difference]: Finished difference Result 90257 states and 367920 transitions. [2021-04-15 04:44:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:44:39,201 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 04:44:39,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:39,736 INFO L225 Difference]: With dead ends: 90257 [2021-04-15 04:44:39,737 INFO L226 Difference]: Without dead ends: 90202 [2021-04-15 04:44:39,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1327.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:44:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90202 states. [2021-04-15 04:44:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90202 to 36036. [2021-04-15 04:44:40,874 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 04:44:40,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 149106 transitions. [2021-04-15 04:44:40,994 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 149106 transitions. Word has length 39 [2021-04-15 04:44:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:40,995 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 149106 transitions. [2021-04-15 04:44:40,995 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 04:44:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 149106 transitions. [2021-04-15 04:44:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:41,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:41,063 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 04:44:41,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 04:44:41,263 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash -571608753, now seen corresponding path program 27 times [2021-04-15 04:44:41,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:41,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786700880] [2021-04-15 04:44:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:41,601 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 04:44:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786700880] [2021-04-15 04:44:41,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360007445] [2021-04-15 04:44:41,601 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 04:44:41,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:44:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:44:41,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:41,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:41,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:44:41,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:41,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:41,837 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 04:44:41,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:89 [2021-04-15 04:44:41,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:44:41,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:41,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:41,997 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 04:44:41,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:16 [2021-04-15 04:44:42,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:42,035 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 04:44:42,036 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 04:44:42,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:42,041 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 04:44:42,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-04-15 04:44:42,065 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 04:44:42,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:42,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:44:42,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191176067] [2021-04-15 04:44:42,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:44:42,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:44:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:44:42,066 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 04:44:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:45,121 INFO L93 Difference]: Finished difference Result 76321 states and 309332 transitions. [2021-04-15 04:44:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:44:45,122 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 04:44:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:45,365 INFO L225 Difference]: With dead ends: 76321 [2021-04-15 04:44:45,365 INFO L226 Difference]: Without dead ends: 76049 [2021-04-15 04:44:45,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1706.2ms TimeCoverageRelationStatistics Valid=484, Invalid=2708, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:44:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76049 states. [2021-04-15 04:44:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76049 to 35555. [2021-04-15 04:44:46,450 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 04:44:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35555 states to 35555 states and 147307 transitions. [2021-04-15 04:44:46,560 INFO L78 Accepts]: Start accepts. Automaton has 35555 states and 147307 transitions. Word has length 39 [2021-04-15 04:44:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:46,561 INFO L480 AbstractCegarLoop]: Abstraction has 35555 states and 147307 transitions. [2021-04-15 04:44:46,561 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 04:44:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 35555 states and 147307 transitions. [2021-04-15 04:44:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:46,629 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:46,629 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 04:44:46,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:46,829 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1628962993, now seen corresponding path program 28 times [2021-04-15 04:44:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567159193] [2021-04-15 04:44:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:47,114 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 04:44:47,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567159193] [2021-04-15 04:44:47,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955882311] [2021-04-15 04:44:47,114 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 04:44:47,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:44:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:44:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:47,321 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:47,321 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 04:44:47,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:47,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:47,329 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 04:44:47,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-04-15 04:44:47,361 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 04:44:47,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:47,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:47,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:47,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-04-15 04:44:47,406 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 04:44:47,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:47,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:44:47,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604405138] [2021-04-15 04:44:47,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:44:47,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:44:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:44:47,407 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 04:44:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:49,071 INFO L93 Difference]: Finished difference Result 69258 states and 285506 transitions. [2021-04-15 04:44:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:44:49,072 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 04:44:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:49,273 INFO L225 Difference]: With dead ends: 69258 [2021-04-15 04:44:49,274 INFO L226 Difference]: Without dead ends: 69203 [2021-04-15 04:44:49,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 798.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:44:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69203 states. [2021-04-15 04:44:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69203 to 35829. [2021-04-15 04:44:50,243 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 04:44:50,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35829 states to 35829 states and 148403 transitions. [2021-04-15 04:44:50,360 INFO L78 Accepts]: Start accepts. Automaton has 35829 states and 148403 transitions. Word has length 39 [2021-04-15 04:44:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:50,360 INFO L480 AbstractCegarLoop]: Abstraction has 35829 states and 148403 transitions. [2021-04-15 04:44:50,360 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 04:44:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 35829 states and 148403 transitions. [2021-04-15 04:44:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:50,435 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:50,435 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 04:44:50,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:44:50,635 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash -731484829, now seen corresponding path program 29 times [2021-04-15 04:44:50,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:50,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461168038] [2021-04-15 04:44:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:50,976 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 04:44:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461168038] [2021-04-15 04:44:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859468641] [2021-04-15 04:44:50,976 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 04:44:51,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:44:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-04-15 04:44:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:51,443 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:44:51,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:51,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:44:51,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:51,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:51,627 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 04:44:51,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:69, output treesize:47 [2021-04-15 04:44:51,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:44:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:51,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:44:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:44:51,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:51,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:51,908 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 04:44:51,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:13 [2021-04-15 04:44:52,000 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 04:44:52,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:52,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:44:52,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805114805] [2021-04-15 04:44:52,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:44:52,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:52,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:44:52,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:44:52,002 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 04:44:55,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:55,035 INFO L93 Difference]: Finished difference Result 62177 states and 253641 transitions. [2021-04-15 04:44:55,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:44:55,035 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 04:44:55,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:55,223 INFO L225 Difference]: With dead ends: 62177 [2021-04-15 04:44:55,223 INFO L226 Difference]: Without dead ends: 61975 [2021-04-15 04:44:55,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1914.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:44:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61975 states. [2021-04-15 04:44:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61975 to 36176. [2021-04-15 04:44:56,099 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 04:44:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36176 states to 36176 states and 149695 transitions. [2021-04-15 04:44:56,211 INFO L78 Accepts]: Start accepts. Automaton has 36176 states and 149695 transitions. Word has length 39 [2021-04-15 04:44:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:44:56,212 INFO L480 AbstractCegarLoop]: Abstraction has 36176 states and 149695 transitions. [2021-04-15 04:44:56,212 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 04:44:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 36176 states and 149695 transitions. [2021-04-15 04:44:56,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:44:56,280 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:44:56,280 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 04:44:56,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 04:44:56,480 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:44:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:44:56,480 INFO L82 PathProgramCache]: Analyzing trace with hash -869929743, now seen corresponding path program 30 times [2021-04-15 04:44:56,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:44:56,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757487199] [2021-04-15 04:44:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:44:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:44:56,807 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 04:44:56,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757487199] [2021-04-15 04:44:56,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053443358] [2021-04-15 04:44:56,807 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 04:44:56,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:44:56,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:44:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:44:56,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:44:57,013 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:44:57,014 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 04:44:57,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:57,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:57,022 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 04:44:57,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-04-15 04:44:57,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:44:57,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:44:57,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:44:57,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:44:57,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:44:57,132 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 04:44:57,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:44:57,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:44:57,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442891144] [2021-04-15 04:44:57,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:44:57,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:44:57,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:44:57,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:44:57,133 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 04:44:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:44:59,494 INFO L93 Difference]: Finished difference Result 78317 states and 318209 transitions. [2021-04-15 04:44:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:44:59,495 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 04:44:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:44:59,981 INFO L225 Difference]: With dead ends: 78317 [2021-04-15 04:44:59,981 INFO L226 Difference]: Without dead ends: 78101 [2021-04-15 04:44:59,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:45:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78101 states. [2021-04-15 04:45:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78101 to 35679. [2021-04-15 04:45:00,862 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 04:45:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35679 states to 35679 states and 147815 transitions. [2021-04-15 04:45:01,226 INFO L78 Accepts]: Start accepts. Automaton has 35679 states and 147815 transitions. Word has length 39 [2021-04-15 04:45:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:01,227 INFO L480 AbstractCegarLoop]: Abstraction has 35679 states and 147815 transitions. [2021-04-15 04:45:01,227 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 04:45:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 35679 states and 147815 transitions. [2021-04-15 04:45:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:01,303 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:01,303 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 04:45:01,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:01,504 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:01,504 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 31 times [2021-04-15 04:45:01,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:01,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008883517] [2021-04-15 04:45:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:01,862 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 04:45:01,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008883517] [2021-04-15 04:45:01,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397212122] [2021-04-15 04:45:01,862 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 04:45:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:01,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:01,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:02,104 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 04:45:02,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:02,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:02,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:02,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:45:02,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:02,143 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 04:45:02,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:02,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:02,146 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 04:45:02,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-04-15 04:45:02,192 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 04:45:02,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:02,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:45:02,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496736456] [2021-04-15 04:45:02,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:45:02,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:45:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:45:02,193 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 04:45:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:03,926 INFO L93 Difference]: Finished difference Result 71308 states and 293693 transitions. [2021-04-15 04:45:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:45:03,926 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 04:45:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:04,168 INFO L225 Difference]: With dead ends: 71308 [2021-04-15 04:45:04,168 INFO L226 Difference]: Without dead ends: 71253 [2021-04-15 04:45:04,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 839.9ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:45:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71253 states. [2021-04-15 04:45:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71253 to 36115. [2021-04-15 04:45:05,239 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 04:45:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36115 states to 36115 states and 149733 transitions. [2021-04-15 04:45:05,363 INFO L78 Accepts]: Start accepts. Automaton has 36115 states and 149733 transitions. Word has length 39 [2021-04-15 04:45:05,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:05,363 INFO L480 AbstractCegarLoop]: Abstraction has 36115 states and 149733 transitions. [2021-04-15 04:45:05,363 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 04:45:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 36115 states and 149733 transitions. [2021-04-15 04:45:05,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:05,440 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:05,441 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 04:45:05,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 04:45:05,641 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:05,641 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 32 times [2021-04-15 04:45:05,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:05,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967920771] [2021-04-15 04:45:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:05,927 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 04:45:05,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967920771] [2021-04-15 04:45:05,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920605854] [2021-04-15 04:45:05,927 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 04:45:05,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:45:05,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:05,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:45:05,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:06,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 04:45:06,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:35 [2021-04-15 04:45:06,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:06,272 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 04:45:06,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:06,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,275 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 04:45:06,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:9 [2021-04-15 04:45:06,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,308 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 11 treesize of output 16 [2021-04-15 04:45:06,309 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:06,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:06,318 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 04:45:06,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:45:06,363 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 04:45:06,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:06,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:45:06,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279614908] [2021-04-15 04:45:06,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:45:06,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:06,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:45:06,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:45:06,364 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 04:45:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:08,843 INFO L93 Difference]: Finished difference Result 91528 states and 377511 transitions. [2021-04-15 04:45:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:45:08,843 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 04:45:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:09,422 INFO L225 Difference]: With dead ends: 91528 [2021-04-15 04:45:09,422 INFO L226 Difference]: Without dead ends: 91473 [2021-04-15 04:45:09,423 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1197.6ms TimeCoverageRelationStatistics Valid=360, Invalid=2190, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:45:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91473 states. [2021-04-15 04:45:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91473 to 36355. [2021-04-15 04:45:10,735 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 04:45:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36355 states to 36355 states and 150793 transitions. [2021-04-15 04:45:10,861 INFO L78 Accepts]: Start accepts. Automaton has 36355 states and 150793 transitions. Word has length 39 [2021-04-15 04:45:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:10,862 INFO L480 AbstractCegarLoop]: Abstraction has 36355 states and 150793 transitions. [2021-04-15 04:45:10,862 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 04:45:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 36355 states and 150793 transitions. [2021-04-15 04:45:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:10,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:10,933 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 04:45:11,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:11,133 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 33 times [2021-04-15 04:45:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:11,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368978925] [2021-04-15 04:45:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:11,407 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 04:45:11,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368978925] [2021-04-15 04:45:11,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878686448] [2021-04-15 04:45:11,407 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 04:45:11,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:45:11,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:11,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:45:11,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:11,659 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 04:45:11,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:11,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:11,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:11,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-04-15 04:45:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:11,757 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:11,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-04-15 04:45:11,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:11,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:11,779 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 04:45:11,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:77 [2021-04-15 04:45:11,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:11,841 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 04:45:11,843 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:11,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:11,868 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 04:45:11,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:11,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:11,891 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 04:45:11,891 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-04-15 04:45:11,991 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 04:45:11,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:11,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-04-15 04:45:11,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480280522] [2021-04-15 04:45:11,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:45:11,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:11,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:45:11,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:45:11,992 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 04:45:13,401 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-04-15 04:45:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:16,779 INFO L93 Difference]: Finished difference Result 96064 states and 394680 transitions. [2021-04-15 04:45:16,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 04:45:16,781 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 04:45:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:17,066 INFO L225 Difference]: With dead ends: 96064 [2021-04-15 04:45:17,066 INFO L226 Difference]: Without dead ends: 95970 [2021-04-15 04:45:17,067 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 2979.4ms TimeCoverageRelationStatistics Valid=780, Invalid=5226, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 04:45:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95970 states. [2021-04-15 04:45:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95970 to 37015. [2021-04-15 04:45:18,330 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 04:45:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37015 states to 37015 states and 153481 transitions. [2021-04-15 04:45:18,460 INFO L78 Accepts]: Start accepts. Automaton has 37015 states and 153481 transitions. Word has length 39 [2021-04-15 04:45:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:18,460 INFO L480 AbstractCegarLoop]: Abstraction has 37015 states and 153481 transitions. [2021-04-15 04:45:18,461 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 04:45:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 37015 states and 153481 transitions. [2021-04-15 04:45:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:18,532 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:18,532 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 04:45:18,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 04:45:18,733 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:18,733 INFO L82 PathProgramCache]: Analyzing trace with hash -555822351, now seen corresponding path program 34 times [2021-04-15 04:45:18,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:18,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802920926] [2021-04-15 04:45:18,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:19,020 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 04:45:19,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802920926] [2021-04-15 04:45:19,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165278194] [2021-04-15 04:45:19,020 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 04:45:19,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:45:19,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:19,231 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 04:45:19,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:19,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:19,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:19,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:45:19,304 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:19,304 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 04:45:19,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:19,542 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-04-15 04:45:19,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:19,543 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 04:45:19,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:45:19,602 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 04:45:19,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:19,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:19,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733499859] [2021-04-15 04:45:19,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:19,603 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 04:45:22,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:22,181 INFO L93 Difference]: Finished difference Result 106237 states and 431864 transitions. [2021-04-15 04:45:22,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:45:22,182 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 04:45:22,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:22,529 INFO L225 Difference]: With dead ends: 106237 [2021-04-15 04:45:22,529 INFO L226 Difference]: Without dead ends: 106182 [2021-04-15 04:45:22,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1298.9ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:45:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106182 states. [2021-04-15 04:45:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106182 to 36507. [2021-04-15 04:45:23,824 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 04:45:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36507 states to 36507 states and 151521 transitions. [2021-04-15 04:45:23,941 INFO L78 Accepts]: Start accepts. Automaton has 36507 states and 151521 transitions. Word has length 39 [2021-04-15 04:45:23,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:23,941 INFO L480 AbstractCegarLoop]: Abstraction has 36507 states and 151521 transitions. [2021-04-15 04:45:23,941 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 04:45:23,941 INFO L276 IsEmpty]: Start isEmpty. Operand 36507 states and 151521 transitions. [2021-04-15 04:45:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:24,011 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:24,011 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 04:45:24,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 04:45:24,217 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 35 times [2021-04-15 04:45:24,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:24,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320540157] [2021-04-15 04:45:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:24,603 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 04:45:24,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320540157] [2021-04-15 04:45:24,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731353768] [2021-04-15 04:45:24,604 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 04:45:24,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:45:24,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:45:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:25,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:25,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:45:25,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:45:25,391 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:45:25,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:25,401 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 04:45:25,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:59 [2021-04-15 04:45:25,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:45:25,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:45:25,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:45:25,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:25,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:25,540 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 04:45:25,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-04-15 04:45:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:25,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:25,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:45:25,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:45:25,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:25,640 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 04:45:25,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:45:25,697 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 04:45:25,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:25,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:45:25,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312960420] [2021-04-15 04:45:25,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:45:25,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:25,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:45:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:45:25,699 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 04:45:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:29,782 INFO L93 Difference]: Finished difference Result 68781 states and 280972 transitions. [2021-04-15 04:45:29,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:45:29,782 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 04:45:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:29,983 INFO L225 Difference]: With dead ends: 68781 [2021-04-15 04:45:29,983 INFO L226 Difference]: Without dead ends: 68560 [2021-04-15 04:45:29,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 2980.0ms TimeCoverageRelationStatistics Valid=732, Invalid=4380, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:45:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68560 states. [2021-04-15 04:45:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68560 to 37012. [2021-04-15 04:45:30,893 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 04:45:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37012 states to 37012 states and 153383 transitions. [2021-04-15 04:45:31,007 INFO L78 Accepts]: Start accepts. Automaton has 37012 states and 153383 transitions. Word has length 39 [2021-04-15 04:45:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:31,007 INFO L480 AbstractCegarLoop]: Abstraction has 37012 states and 153383 transitions. [2021-04-15 04:45:31,007 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 04:45:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 37012 states and 153383 transitions. [2021-04-15 04:45:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:31,080 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:31,080 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 04:45:31,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:31,281 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:31,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:31,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1669092457, now seen corresponding path program 36 times [2021-04-15 04:45:31,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:31,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487578588] [2021-04-15 04:45:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:31,649 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 04:45:31,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487578588] [2021-04-15 04:45:31,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94467233] [2021-04-15 04:45:31,649 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 04:45:31,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:45:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:31,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:45:31,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:31,916 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:31,916 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 04:45:31,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:31,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:31,924 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 04:45:31,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-04-15 04:45:31,959 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 35 treesize of output 27 [2021-04-15 04:45:31,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:31,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:31,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:31,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:45:32,009 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 04:45:32,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:32,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:32,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938109188] [2021-04-15 04:45:32,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:32,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:32,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:32,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:32,011 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 04:45:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:34,520 INFO L93 Difference]: Finished difference Result 79074 states and 321254 transitions. [2021-04-15 04:45:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:45:34,521 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 04:45:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:35,016 INFO L225 Difference]: With dead ends: 79074 [2021-04-15 04:45:35,016 INFO L226 Difference]: Without dead ends: 78850 [2021-04-15 04:45:35,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1336.9ms TimeCoverageRelationStatistics Valid=422, Invalid=2028, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:45:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78850 states. [2021-04-15 04:45:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78850 to 36693. [2021-04-15 04:45:35,897 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 04:45:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 152221 transitions. [2021-04-15 04:45:36,248 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 152221 transitions. Word has length 39 [2021-04-15 04:45:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:36,248 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 152221 transitions. [2021-04-15 04:45:36,248 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 04:45:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 152221 transitions. [2021-04-15 04:45:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:36,318 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:36,318 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 04:45:36,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:36,518 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash 452270203, now seen corresponding path program 37 times [2021-04-15 04:45:36,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:36,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735375084] [2021-04-15 04:45:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:36,893 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 04:45:36,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735375084] [2021-04-15 04:45:36,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708268531] [2021-04-15 04:45:36,893 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 04:45:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:36,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:37,179 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 04:45:37,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:37,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:37,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:37,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:45:37,220 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:37,221 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 04:45:37,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:37,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:37,223 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 04:45:37,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:45:37,275 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 04:45:37,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:37,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:37,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702484335] [2021-04-15 04:45:37,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:37,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:37,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:37,276 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 04:45:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:39,350 INFO L93 Difference]: Finished difference Result 80869 states and 329178 transitions. [2021-04-15 04:45:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:45:39,351 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 04:45:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:39,592 INFO L225 Difference]: With dead ends: 80869 [2021-04-15 04:45:39,592 INFO L226 Difference]: Without dead ends: 80701 [2021-04-15 04:45:39,592 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:45:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80701 states. [2021-04-15 04:45:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80701 to 36755. [2021-04-15 04:45:40,753 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 04:45:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36755 states to 36755 states and 152513 transitions. [2021-04-15 04:45:40,875 INFO L78 Accepts]: Start accepts. Automaton has 36755 states and 152513 transitions. Word has length 39 [2021-04-15 04:45:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:40,876 INFO L480 AbstractCegarLoop]: Abstraction has 36755 states and 152513 transitions. [2021-04-15 04:45:40,876 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 04:45:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 36755 states and 152513 transitions. [2021-04-15 04:45:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:40,948 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:40,948 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 04:45:41,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:41,148 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 38 times [2021-04-15 04:45:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:41,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460105111] [2021-04-15 04:45:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:41,525 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 04:45:41,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460105111] [2021-04-15 04:45:41,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844985313] [2021-04-15 04:45:41,526 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 04:45:41,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:45:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:41,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:41,791 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 04:45:41,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:41,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:41,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:41,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:45:41,839 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:41,839 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 04:45:41,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:41,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:41,842 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 04:45:41,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:45:41,895 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 04:45:41,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:41,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:41,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011003216] [2021-04-15 04:45:41,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:41,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:41,897 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 04:45:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:43,762 INFO L93 Difference]: Finished difference Result 67634 states and 276737 transitions. [2021-04-15 04:45:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:45:43,763 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 04:45:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:43,957 INFO L225 Difference]: With dead ends: 67634 [2021-04-15 04:45:43,957 INFO L226 Difference]: Without dead ends: 67544 [2021-04-15 04:45:43,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1242.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:45:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67544 states. [2021-04-15 04:45:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67544 to 36721. [2021-04-15 04:45:45,020 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 04:45:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152495 transitions. [2021-04-15 04:45:45,136 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152495 transitions. Word has length 39 [2021-04-15 04:45:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:45,136 INFO L480 AbstractCegarLoop]: Abstraction has 36721 states and 152495 transitions. [2021-04-15 04:45:45,137 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 04:45:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152495 transitions. [2021-04-15 04:45:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:45,210 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:45,210 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 04:45:45,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 04:45:45,411 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:45,411 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 39 times [2021-04-15 04:45:45,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:45,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158322450] [2021-04-15 04:45:45,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:45,803 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 04:45:45,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158322450] [2021-04-15 04:45:45,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350656438] [2021-04-15 04:45:45,803 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 04:45:45,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:45:45,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:45:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:46,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:46,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:46,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-04-15 04:45:46,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:46,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:46,371 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 04:45:46,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:109 [2021-04-15 04:45:46,492 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 04:45:46,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:46,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:46,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:46,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:45:46,546 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 04:45:46,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:46,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:45:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317877480] [2021-04-15 04:45:46,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:45:46,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:46,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:45:46,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:45:46,547 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 04:45:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:48,537 INFO L93 Difference]: Finished difference Result 61224 states and 250106 transitions. [2021-04-15 04:45:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:45:48,537 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 04:45:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:48,938 INFO L225 Difference]: With dead ends: 61224 [2021-04-15 04:45:48,939 INFO L226 Difference]: Without dead ends: 61096 [2021-04-15 04:45:48,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1573.6ms TimeCoverageRelationStatistics Valid=327, Invalid=1565, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:45:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61096 states. [2021-04-15 04:45:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61096 to 37078. [2021-04-15 04:45:49,768 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 04:45:49,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37078 states to 37078 states and 153771 transitions. [2021-04-15 04:45:49,880 INFO L78 Accepts]: Start accepts. Automaton has 37078 states and 153771 transitions. Word has length 39 [2021-04-15 04:45:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:49,880 INFO L480 AbstractCegarLoop]: Abstraction has 37078 states and 153771 transitions. [2021-04-15 04:45:49,880 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 04:45:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 37078 states and 153771 transitions. [2021-04-15 04:45:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:50,131 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:50,131 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 04:45:50,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:50,345 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2130742231, now seen corresponding path program 40 times [2021-04-15 04:45:50,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:50,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205437204] [2021-04-15 04:45:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:50,751 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 04:45:50,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205437204] [2021-04-15 04:45:50,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47818009] [2021-04-15 04:45:50,751 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 04:45:50,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:45:50,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:45:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:51,008 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:45:51,008 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 04:45:51,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:51,016 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 04:45:51,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:45:51,091 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 04:45:51,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:51,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:45:51,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:45:51,144 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 04:45:51,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:51,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:45:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627896745] [2021-04-15 04:45:51,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:45:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:51,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:45:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:45:51,145 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 04:45:53,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:45:53,223 INFO L93 Difference]: Finished difference Result 78252 states and 318289 transitions. [2021-04-15 04:45:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:45:53,224 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 04:45:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:45:53,468 INFO L225 Difference]: With dead ends: 78252 [2021-04-15 04:45:53,468 INFO L226 Difference]: Without dead ends: 78068 [2021-04-15 04:45:53,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1318.7ms TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:45:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78068 states. [2021-04-15 04:45:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78068 to 36745. [2021-04-15 04:45:54,572 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 04:45:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 152579 transitions. [2021-04-15 04:45:54,693 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 152579 transitions. Word has length 39 [2021-04-15 04:45:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:45:54,693 INFO L480 AbstractCegarLoop]: Abstraction has 36745 states and 152579 transitions. [2021-04-15 04:45:54,693 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 04:45:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 152579 transitions. [2021-04-15 04:45:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:45:54,767 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:45:54,768 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 04:45:54,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:45:54,968 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:45:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:45:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 41 times [2021-04-15 04:45:54,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:45:54,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115177640] [2021-04-15 04:45:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:45:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:45:55,382 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 04:45:55,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115177640] [2021-04-15 04:45:55,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121215302] [2021-04-15 04:45:55,382 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 04:45:55,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:45:55,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:45:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:45:55,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:45:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:55,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:55,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:55,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:45:55,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:45:55,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:55,833 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 04:45:55,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:56 [2021-04-15 04:45:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:56,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:45:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:56,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:45:56,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-04-15 04:45:56,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:45:56,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:56,016 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 04:45:56,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:27 [2021-04-15 04:45:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:56,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:45:56,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:56,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 39 [2021-04-15 04:45:56,112 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:45:56,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:45:56,126 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 04:45:56,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:45:56,190 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 04:45:56,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:45:56,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:45:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641327124] [2021-04-15 04:45:56,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:45:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:45:56,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:45:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:45:56,191 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 04:46:02,093 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-04-15 04:46:02,257 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-04-15 04:46:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:05,394 INFO L93 Difference]: Finished difference Result 81058 states and 330146 transitions. [2021-04-15 04:46:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-04-15 04:46:05,394 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 04:46:05,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:05,655 INFO L225 Difference]: With dead ends: 81058 [2021-04-15 04:46:05,655 INFO L226 Difference]: Without dead ends: 80725 [2021-04-15 04:46:05,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 6331.5ms TimeCoverageRelationStatistics Valid=1233, Invalid=10977, Unknown=0, NotChecked=0, Total=12210 [2021-04-15 04:46:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80725 states. [2021-04-15 04:46:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80725 to 37394. [2021-04-15 04:46:06,740 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 04:46:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37394 states to 37394 states and 155115 transitions. [2021-04-15 04:46:06,854 INFO L78 Accepts]: Start accepts. Automaton has 37394 states and 155115 transitions. Word has length 39 [2021-04-15 04:46:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:06,855 INFO L480 AbstractCegarLoop]: Abstraction has 37394 states and 155115 transitions. [2021-04-15 04:46:06,855 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 04:46:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 37394 states and 155115 transitions. [2021-04-15 04:46:06,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:06,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:06,927 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 04:46:07,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:07,128 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 42 times [2021-04-15 04:46:07,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:07,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601173176] [2021-04-15 04:46:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:07,561 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 04:46:07,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601173176] [2021-04-15 04:46:07,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721791424] [2021-04-15 04:46:07,561 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 04:46:07,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:46:07,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:07,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:46:07,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:07,855 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:07,855 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 04:46:07,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:07,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:07,864 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 04:46:07,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-04-15 04:46:07,902 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 04:46:07,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:07,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:07,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:07,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:46:07,967 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 04:46:07,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:07,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856398266] [2021-04-15 04:46:07,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:07,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:07,968 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 04:46:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:10,287 INFO L93 Difference]: Finished difference Result 79507 states and 323183 transitions. [2021-04-15 04:46:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:46:10,288 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 04:46:10,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:10,512 INFO L225 Difference]: With dead ends: 79507 [2021-04-15 04:46:10,512 INFO L226 Difference]: Without dead ends: 79283 [2021-04-15 04:46:10,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1477.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:46:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79283 states. [2021-04-15 04:46:11,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79283 to 37270. [2021-04-15 04:46:11,603 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 04:46:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37270 states to 37270 states and 154673 transitions. [2021-04-15 04:46:11,713 INFO L78 Accepts]: Start accepts. Automaton has 37270 states and 154673 transitions. Word has length 39 [2021-04-15 04:46:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:11,713 INFO L480 AbstractCegarLoop]: Abstraction has 37270 states and 154673 transitions. [2021-04-15 04:46:11,713 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 04:46:11,714 INFO L276 IsEmpty]: Start isEmpty. Operand 37270 states and 154673 transitions. [2021-04-15 04:46:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:11,779 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:11,780 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 04:46:11,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:11,980 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 43 times [2021-04-15 04:46:11,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:11,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415827850] [2021-04-15 04:46:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:12,365 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 04:46:12,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415827850] [2021-04-15 04:46:12,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85010871] [2021-04-15 04:46:12,365 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 04:46:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:46:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:12,880 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 04:46:12,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:12,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:12,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:12,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:46:12,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:12,926 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 04:46:12,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:12,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:12,928 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 04:46:12,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:46:12,983 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 04:46:12,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:12,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:12,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733659153] [2021-04-15 04:46:12,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:12,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:12,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:12,984 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 04:46:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:14,854 INFO L93 Difference]: Finished difference Result 81312 states and 331062 transitions. [2021-04-15 04:46:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:46:14,855 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 04:46:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:15,338 INFO L225 Difference]: With dead ends: 81312 [2021-04-15 04:46:15,338 INFO L226 Difference]: Without dead ends: 81160 [2021-04-15 04:46:15,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1507.5ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:46:15,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81160 states. [2021-04-15 04:46:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81160 to 37320. [2021-04-15 04:46:16,217 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 04:46:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37320 states to 37320 states and 154897 transitions. [2021-04-15 04:46:16,573 INFO L78 Accepts]: Start accepts. Automaton has 37320 states and 154897 transitions. Word has length 39 [2021-04-15 04:46:16,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:16,573 INFO L480 AbstractCegarLoop]: Abstraction has 37320 states and 154897 transitions. [2021-04-15 04:46:16,573 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 04:46:16,573 INFO L276 IsEmpty]: Start isEmpty. Operand 37320 states and 154897 transitions. [2021-04-15 04:46:16,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:16,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:16,642 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 04:46:16,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:16,842 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 44 times [2021-04-15 04:46:16,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:16,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854711624] [2021-04-15 04:46:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:17,275 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 04:46:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854711624] [2021-04-15 04:46:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940534641] [2021-04-15 04:46:17,276 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 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 04:46:17,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:46:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:46:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:17,586 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 04:46:17,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:17,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:17,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:17,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:46:17,634 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:17,634 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 04:46:17,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:17,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:17,637 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 04:46:17,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:46:17,696 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 04:46:17,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:17,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:17,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554901463] [2021-04-15 04:46:17,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:17,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:17,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:17,697 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 04:46:19,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:19,716 INFO L93 Difference]: Finished difference Result 68093 states and 278664 transitions. [2021-04-15 04:46:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:46:19,717 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 04:46:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:19,914 INFO L225 Difference]: With dead ends: 68093 [2021-04-15 04:46:19,915 INFO L226 Difference]: Without dead ends: 68003 [2021-04-15 04:46:19,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1156.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:46:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68003 states. [2021-04-15 04:46:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68003 to 37072. [2021-04-15 04:46:20,889 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 04:46:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37072 states to 37072 states and 153905 transitions. [2021-04-15 04:46:21,005 INFO L78 Accepts]: Start accepts. Automaton has 37072 states and 153905 transitions. Word has length 39 [2021-04-15 04:46:21,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:21,005 INFO L480 AbstractCegarLoop]: Abstraction has 37072 states and 153905 transitions. [2021-04-15 04:46:21,006 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 04:46:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 37072 states and 153905 transitions. [2021-04-15 04:46:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:21,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:21,074 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 04:46:21,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:21,278 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:21,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:21,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1034892989, now seen corresponding path program 45 times [2021-04-15 04:46:21,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:21,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392168865] [2021-04-15 04:46:21,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:21,587 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 04:46:21,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392168865] [2021-04-15 04:46:21,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842378712] [2021-04-15 04:46:21,588 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 04:46:21,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:46:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:46:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:21,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:21,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 04:46:21,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:21,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:21,853 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 04:46:21,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-04-15 04:46:21,967 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 04:46:21,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:21,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:21,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:21,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:46:22,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:22,049 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 04:46:22,050 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:22,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:22,060 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 04:46:22,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:46:22,108 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 04:46:22,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:22,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-04-15 04:46:22,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972444239] [2021-04-15 04:46:22,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:46:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:46:22,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:46:22,109 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 04:46:23,371 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-04-15 04:46:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:25,096 INFO L93 Difference]: Finished difference Result 68200 states and 279286 transitions. [2021-04-15 04:46:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:46:25,097 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 04:46:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:25,305 INFO L225 Difference]: With dead ends: 68200 [2021-04-15 04:46:25,305 INFO L226 Difference]: Without dead ends: 68145 [2021-04-15 04:46:25,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 2099.4ms TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:46:25,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68145 states. [2021-04-15 04:46:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68145 to 37651. [2021-04-15 04:46:26,325 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 04:46:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37651 states to 37651 states and 156223 transitions. [2021-04-15 04:46:26,439 INFO L78 Accepts]: Start accepts. Automaton has 37651 states and 156223 transitions. Word has length 39 [2021-04-15 04:46:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:26,440 INFO L480 AbstractCegarLoop]: Abstraction has 37651 states and 156223 transitions. [2021-04-15 04:46:26,440 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 04:46:26,440 INFO L276 IsEmpty]: Start isEmpty. Operand 37651 states and 156223 transitions. [2021-04-15 04:46:26,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:26,508 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:26,508 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 04:46:26,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:26,709 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 899626485, now seen corresponding path program 46 times [2021-04-15 04:46:26,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:26,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100617781] [2021-04-15 04:46:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:27,296 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 04:46:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100617781] [2021-04-15 04:46:27,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755477788] [2021-04-15 04:46:27,297 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 04:46:27,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:46:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:46:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:27,526 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:27,526 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 04:46:27,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:27,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:27,535 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 04:46:27,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-04-15 04:46:27,649 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 04:46:27,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:27,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:27,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:27,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:46:27,707 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 04:46:27,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:27,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:27,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164827862] [2021-04-15 04:46:27,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:27,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:27,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:27,708 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 04:46:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:29,635 INFO L93 Difference]: Finished difference Result 65825 states and 269786 transitions. [2021-04-15 04:46:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:46:29,636 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 04:46:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:30,045 INFO L225 Difference]: With dead ends: 65825 [2021-04-15 04:46:30,045 INFO L226 Difference]: Without dead ends: 65609 [2021-04-15 04:46:30,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1603.9ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:46:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65609 states. [2021-04-15 04:46:30,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65609 to 37607. [2021-04-15 04:46:30,805 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 04:46:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37607 states to 37607 states and 156065 transitions. [2021-04-15 04:46:30,926 INFO L78 Accepts]: Start accepts. Automaton has 37607 states and 156065 transitions. Word has length 39 [2021-04-15 04:46:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:30,926 INFO L480 AbstractCegarLoop]: Abstraction has 37607 states and 156065 transitions. [2021-04-15 04:46:30,926 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 04:46:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 37607 states and 156065 transitions. [2021-04-15 04:46:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:31,182 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:31,182 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 04:46:31,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 04:46:31,387 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:31,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:31,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1502735341, now seen corresponding path program 47 times [2021-04-15 04:46:31,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:31,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895429489] [2021-04-15 04:46:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:31,822 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 04:46:31,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895429489] [2021-04-15 04:46:31,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380997135] [2021-04-15 04:46:31,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:46:31,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:46:31,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:46:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:32,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:32,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:46:32,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:32,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:32,231 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 04:46:32,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:44 [2021-04-15 04:46:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:32,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:32,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-04-15 04:46:32,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:32,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:32,556 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 04:46:32,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:27 [2021-04-15 04:46:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:32,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:32,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:46:32,658 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:32,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:32,672 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 04:46:32,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:46:32,738 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 04:46:32,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:32,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:46:32,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634587793] [2021-04-15 04:46:32,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:46:32,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:46:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:46:32,739 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 04:46:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:37,937 INFO L93 Difference]: Finished difference Result 70286 states and 287534 transitions. [2021-04-15 04:46:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 04:46:37,937 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 04:46:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:38,150 INFO L225 Difference]: With dead ends: 70286 [2021-04-15 04:46:38,151 INFO L226 Difference]: Without dead ends: 70065 [2021-04-15 04:46:38,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 3345.8ms TimeCoverageRelationStatistics Valid=732, Invalid=4238, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:46:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70065 states. [2021-04-15 04:46:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70065 to 37939. [2021-04-15 04:46:39,095 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 04:46:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37939 states to 37939 states and 157305 transitions. [2021-04-15 04:46:39,219 INFO L78 Accepts]: Start accepts. Automaton has 37939 states and 157305 transitions. Word has length 39 [2021-04-15 04:46:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:39,219 INFO L480 AbstractCegarLoop]: Abstraction has 37939 states and 157305 transitions. [2021-04-15 04:46:39,219 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 04:46:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37939 states and 157305 transitions. [2021-04-15 04:46:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:39,294 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:39,294 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 04:46:39,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:46:39,494 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1438695687, now seen corresponding path program 48 times [2021-04-15 04:46:39,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:39,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673605895] [2021-04-15 04:46:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:40,058 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 04:46:40,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673605895] [2021-04-15 04:46:40,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487046252] [2021-04-15 04:46:40,059 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 04:46:40,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:46:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:46:40,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:40,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:46:40,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,475 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 04:46:40,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-04-15 04:46:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:40,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:46:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-04-15 04:46:40,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,694 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 04:46:40,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:12 [2021-04-15 04:46:40,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,771 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 04:46:40,773 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:40,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:40,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:40,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:14 [2021-04-15 04:46:40,847 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 04:46:40,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:40,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-04-15 04:46:40,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937379989] [2021-04-15 04:46:40,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:46:40,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:40,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:46:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:46:40,848 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 04:46:43,548 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-04-15 04:46:44,178 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-04-15 04:46:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:45,315 INFO L93 Difference]: Finished difference Result 81507 states and 329555 transitions. [2021-04-15 04:46:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:46:45,316 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 04:46:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:45,569 INFO L225 Difference]: With dead ends: 81507 [2021-04-15 04:46:45,569 INFO L226 Difference]: Without dead ends: 81409 [2021-04-15 04:46:45,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3110.9ms TimeCoverageRelationStatistics Valid=774, Invalid=3782, Unknown=0, NotChecked=0, Total=4556 [2021-04-15 04:46:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81409 states. [2021-04-15 04:46:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81409 to 38068. [2021-04-15 04:46:46,688 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 04:46:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38068 states to 38068 states and 157793 transitions. [2021-04-15 04:46:46,808 INFO L78 Accepts]: Start accepts. Automaton has 38068 states and 157793 transitions. Word has length 39 [2021-04-15 04:46:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:46,808 INFO L480 AbstractCegarLoop]: Abstraction has 38068 states and 157793 transitions. [2021-04-15 04:46:46,808 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 04:46:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 38068 states and 157793 transitions. [2021-04-15 04:46:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:46,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:46,886 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 04:46:47,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 04:46:47,087 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1311781951, now seen corresponding path program 49 times [2021-04-15 04:46:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:47,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367828915] [2021-04-15 04:46:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:47,541 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 04:46:47,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367828915] [2021-04-15 04:46:47,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727050430] [2021-04-15 04:46:47,541 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 04:46:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:46:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:47,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:47,964 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 04:46:47,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:47,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:47,974 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 04:46:47,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-04-15 04:46:48,096 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 04:46:48,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:48,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:48,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:46:48,160 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 04:46:48,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:48,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:46:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536129828] [2021-04-15 04:46:48,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:46:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:46:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:46:48,161 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 04:46:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:50,166 INFO L93 Difference]: Finished difference Result 80010 states and 325453 transitions. [2021-04-15 04:46:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:46:50,167 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 04:46:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:50,649 INFO L225 Difference]: With dead ends: 80010 [2021-04-15 04:46:50,649 INFO L226 Difference]: Without dead ends: 79826 [2021-04-15 04:46:50,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1733.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1790, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:46:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79826 states. [2021-04-15 04:46:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79826 to 37815. [2021-04-15 04:46:51,572 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 04:46:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37815 states to 37815 states and 156874 transitions. [2021-04-15 04:46:51,944 INFO L78 Accepts]: Start accepts. Automaton has 37815 states and 156874 transitions. Word has length 39 [2021-04-15 04:46:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:51,944 INFO L480 AbstractCegarLoop]: Abstraction has 37815 states and 156874 transitions. [2021-04-15 04:46:51,944 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 04:46:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 37815 states and 156874 transitions. [2021-04-15 04:46:52,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:52,016 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:52,016 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 04:46:52,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 04:46:52,216 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1564579539, now seen corresponding path program 50 times [2021-04-15 04:46:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:52,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248851694] [2021-04-15 04:46:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:52,579 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 04:46:52,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248851694] [2021-04-15 04:46:52,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928673165] [2021-04-15 04:46:52,579 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 04:46:52,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:46:52,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:52,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:46:52,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:52,856 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:46:52,856 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 04:46:52,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:52,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:52,866 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 04:46:52,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:46:52,908 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 30 treesize of output 22 [2021-04-15 04:46:52,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:52,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:52,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:46:52,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:46:52,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:52,997 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 04:46:52,998 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:46:53,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:53,009 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 04:46:53,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:46:53,057 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 04:46:53,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:53,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:46:53,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105355635] [2021-04-15 04:46:53,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:46:53,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:53,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:46:53,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:46:53,059 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 04:46:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:46:56,107 INFO L93 Difference]: Finished difference Result 81479 states and 335542 transitions. [2021-04-15 04:46:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:46:56,109 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 04:46:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:46:56,360 INFO L225 Difference]: With dead ends: 81479 [2021-04-15 04:46:56,360 INFO L226 Difference]: Without dead ends: 81424 [2021-04-15 04:46:56,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1615.8ms TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:46:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81424 states. [2021-04-15 04:46:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81424 to 38089. [2021-04-15 04:46:57,436 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 04:46:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38089 states to 38089 states and 157970 transitions. [2021-04-15 04:46:57,551 INFO L78 Accepts]: Start accepts. Automaton has 38089 states and 157970 transitions. Word has length 39 [2021-04-15 04:46:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:46:57,552 INFO L480 AbstractCegarLoop]: Abstraction has 38089 states and 157970 transitions. [2021-04-15 04:46:57,552 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 04:46:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 38089 states and 157970 transitions. [2021-04-15 04:46:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:46:57,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:46:57,622 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 04:46:57,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-04-15 04:46:57,825 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:46:57,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:46:57,825 INFO L82 PathProgramCache]: Analyzing trace with hash 369939935, now seen corresponding path program 51 times [2021-04-15 04:46:57,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:46:57,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299017963] [2021-04-15 04:46:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:46:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:46:58,282 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 04:46:58,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299017963] [2021-04-15 04:46:58,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669870490] [2021-04-15 04:46:58,282 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 04:46:58,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:46:58,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:46:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:46:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:46:58,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:58,795 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-04-15 04:46:58,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:58,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:58,853 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 04:46:58,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:55 [2021-04-15 04:46:59,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:59,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:46:59,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:59,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:46:59,396 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 04:46:59,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:108 [2021-04-15 04:46:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:59,565 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 04:46:59,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:46:59,573 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 04:46:59,575 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 04:46:59,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:46:59,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:59,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:46:59,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:46:59,620 INFO L628 ElimStorePlain]: treesize reduction 115, result has 11.5 percent of original size [2021-04-15 04:46:59,621 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 04:46:59,621 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:207, output treesize:13 [2021-04-15 04:46:59,737 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 04:46:59,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:46:59,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-04-15 04:46:59,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221669485] [2021-04-15 04:46:59,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:46:59,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:46:59,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:46:59,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:46:59,738 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 04:47:04,215 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-04-15 04:47:04,763 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:47:05,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:05,155 INFO L93 Difference]: Finished difference Result 63464 states and 258675 transitions. [2021-04-15 04:47:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:47:05,156 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 04:47:05,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:05,376 INFO L225 Difference]: With dead ends: 63464 [2021-04-15 04:47:05,376 INFO L226 Difference]: Without dead ends: 63308 [2021-04-15 04:47:05,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 3808.2ms TimeCoverageRelationStatistics Valid=739, Invalid=4231, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:47:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63308 states. [2021-04-15 04:47:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63308 to 38367. [2021-04-15 04:47:06,362 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 04:47:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38367 states to 38367 states and 158960 transitions. [2021-04-15 04:47:06,497 INFO L78 Accepts]: Start accepts. Automaton has 38367 states and 158960 transitions. Word has length 39 [2021-04-15 04:47:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:06,497 INFO L480 AbstractCegarLoop]: Abstraction has 38367 states and 158960 transitions. [2021-04-15 04:47:06,497 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 04:47:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 38367 states and 158960 transitions. [2021-04-15 04:47:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:06,578 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:06,578 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 04:47:06,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:06,778 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:06,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1311896975, now seen corresponding path program 52 times [2021-04-15 04:47:06,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:06,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233615537] [2021-04-15 04:47:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:07,303 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 04:47:07,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233615537] [2021-04-15 04:47:07,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632263965] [2021-04-15 04:47:07,304 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 04:47:07,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:47:07,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:07,625 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:47:07,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:07,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:07,638 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 04:47:07,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-04-15 04:47:07,744 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 04:47:07,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:07,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:07,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:07,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:47:07,820 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 04:47:07,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:07,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:47:07,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043453391] [2021-04-15 04:47:07,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:47:07,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:07,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:47:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:47:07,822 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 04:47:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:11,400 INFO L93 Difference]: Finished difference Result 80709 states and 328280 transitions. [2021-04-15 04:47:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:47:11,402 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 04:47:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:11,650 INFO L225 Difference]: With dead ends: 80709 [2021-04-15 04:47:11,651 INFO L226 Difference]: Without dead ends: 80493 [2021-04-15 04:47:11,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 2225.0ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:47:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80493 states. [2021-04-15 04:47:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80493 to 38109. [2021-04-15 04:47:12,818 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 04:47:12,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38109 states to 38109 states and 157978 transitions. [2021-04-15 04:47:12,939 INFO L78 Accepts]: Start accepts. Automaton has 38109 states and 157978 transitions. Word has length 39 [2021-04-15 04:47:12,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:12,940 INFO L480 AbstractCegarLoop]: Abstraction has 38109 states and 157978 transitions. [2021-04-15 04:47:12,940 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 04:47:12,940 INFO L276 IsEmpty]: Start isEmpty. Operand 38109 states and 157978 transitions. [2021-04-15 04:47:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:13,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:13,014 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 04:47:13,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:13,221 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1573156905, now seen corresponding path program 53 times [2021-04-15 04:47:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:13,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924467595] [2021-04-15 04:47:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:13,740 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:47:14,012 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 04:47:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924467595] [2021-04-15 04:47:14,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068692143] [2021-04-15 04:47:14,013 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 04:47:14,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:47:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:14,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:47:14,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:14,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:14,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:14,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:37 [2021-04-15 04:47:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:14,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:14,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:14,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 54 [2021-04-15 04:47:14,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:47:14,478 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-04-15 04:47:14,480 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 04:47:14,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:34 [2021-04-15 04:47:14,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:47:14,658 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 04:47:14,661 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 04:47:14,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:14,669 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 04:47:14,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:3 [2021-04-15 04:47:14,698 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 04:47:14,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:14,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:47:14,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588769770] [2021-04-15 04:47:14,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:47:14,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:14,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:47:14,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:47:14,699 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 04:47:19,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:19,150 INFO L93 Difference]: Finished difference Result 67305 states and 274805 transitions. [2021-04-15 04:47:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:47:19,151 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 04:47:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:19,359 INFO L225 Difference]: With dead ends: 67305 [2021-04-15 04:47:19,360 INFO L226 Difference]: Without dead ends: 67250 [2021-04-15 04:47:19,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2997.6ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:47:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67250 states. [2021-04-15 04:47:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67250 to 38670. [2021-04-15 04:47:20,367 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 04:47:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38670 states to 38670 states and 160471 transitions. [2021-04-15 04:47:20,495 INFO L78 Accepts]: Start accepts. Automaton has 38670 states and 160471 transitions. Word has length 39 [2021-04-15 04:47:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:20,495 INFO L480 AbstractCegarLoop]: Abstraction has 38670 states and 160471 transitions. [2021-04-15 04:47:20,495 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 04:47:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 38670 states and 160471 transitions. [2021-04-15 04:47:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:20,569 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:20,569 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 04:47:20,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 04:47:20,770 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:20,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1254976421, now seen corresponding path program 54 times [2021-04-15 04:47:20,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:20,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692283953] [2021-04-15 04:47:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:21,263 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 04:47:21,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692283953] [2021-04-15 04:47:21,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468997719] [2021-04-15 04:47:21,264 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 04:47:21,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:47:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:21,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 04:47:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:47:21,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:21,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:21,740 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 04:47:21,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:41 [2021-04-15 04:47:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:21,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:21,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:47:21,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-04-15 04:47:21,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:21,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:21,819 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 04:47:21,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:12 [2021-04-15 04:47:21,932 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 04:47:21,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:21,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:47:21,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72456961] [2021-04-15 04:47:21,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:47:21,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:21,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:47:21,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:47:21,933 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 04:47:23,449 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:47:25,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:25,168 INFO L93 Difference]: Finished difference Result 93986 states and 383473 transitions. [2021-04-15 04:47:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:47:25,169 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 04:47:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:25,471 INFO L225 Difference]: With dead ends: 93986 [2021-04-15 04:47:25,471 INFO L226 Difference]: Without dead ends: 93931 [2021-04-15 04:47:25,472 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 2327.0ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:47:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93931 states. [2021-04-15 04:47:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93931 to 38539. [2021-04-15 04:47:26,812 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 04:47:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159812 transitions. [2021-04-15 04:47:27,200 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159812 transitions. Word has length 39 [2021-04-15 04:47:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:27,200 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159812 transitions. [2021-04-15 04:47:27,201 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 04:47:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159812 transitions. [2021-04-15 04:47:27,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:27,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:27,279 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 04:47:27,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:27,479 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:27,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:27,480 INFO L82 PathProgramCache]: Analyzing trace with hash 935568875, now seen corresponding path program 55 times [2021-04-15 04:47:27,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:27,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850161096] [2021-04-15 04:47:27,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:27,849 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 04:47:27,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850161096] [2021-04-15 04:47:27,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338931259] [2021-04-15 04:47:27,849 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 04:47:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:28,137 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 04:47:28,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:28,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:28,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:28,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:47:28,251 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:28,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:47:28,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:28,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:28,255 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 04:47:28,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:47:28,310 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 04:47:28,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:28,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:47:28,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652858442] [2021-04-15 04:47:28,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:47:28,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:47:28,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:47:28,311 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 04:47:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:30,819 INFO L93 Difference]: Finished difference Result 88125 states and 363578 transitions. [2021-04-15 04:47:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:47:30,820 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 04:47:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:31,090 INFO L225 Difference]: With dead ends: 88125 [2021-04-15 04:47:31,090 INFO L226 Difference]: Without dead ends: 88070 [2021-04-15 04:47:31,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1192.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:47:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88070 states. [2021-04-15 04:47:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88070 to 39031. [2021-04-15 04:47:32,286 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 04:47:32,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39031 states to 39031 states and 161948 transitions. [2021-04-15 04:47:32,413 INFO L78 Accepts]: Start accepts. Automaton has 39031 states and 161948 transitions. Word has length 39 [2021-04-15 04:47:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:32,413 INFO L480 AbstractCegarLoop]: Abstraction has 39031 states and 161948 transitions. [2021-04-15 04:47:32,413 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 04:47:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 39031 states and 161948 transitions. [2021-04-15 04:47:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:32,487 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:32,487 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 04:47:32,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-04-15 04:47:32,688 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:32,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:32,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1940405397, now seen corresponding path program 56 times [2021-04-15 04:47:32,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:32,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738165154] [2021-04-15 04:47:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:33,086 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 04:47:33,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738165154] [2021-04-15 04:47:33,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502979517] [2021-04-15 04:47:33,087 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 04:47:33,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:47:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:33,403 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 04:47:33,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:33,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:33,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:33,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:47:33,534 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:33,535 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 04:47:33,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:33,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:33,539 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 04:47:33,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:47:33,594 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 04:47:33,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:33,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:47:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978191262] [2021-04-15 04:47:33,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:47:33,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:47:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:47:33,595 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 04:47:34,995 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-04-15 04:47:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:36,492 INFO L93 Difference]: Finished difference Result 85381 states and 351989 transitions. [2021-04-15 04:47:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:47:36,493 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 04:47:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:36,795 INFO L225 Difference]: With dead ends: 85381 [2021-04-15 04:47:36,795 INFO L226 Difference]: Without dead ends: 85326 [2021-04-15 04:47:36,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1579.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 04:47:36,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85326 states. [2021-04-15 04:47:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85326 to 38439. [2021-04-15 04:47:38,166 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 04:47:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38439 states to 38439 states and 159372 transitions. [2021-04-15 04:47:38,295 INFO L78 Accepts]: Start accepts. Automaton has 38439 states and 159372 transitions. Word has length 39 [2021-04-15 04:47:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:38,295 INFO L480 AbstractCegarLoop]: Abstraction has 38439 states and 159372 transitions. [2021-04-15 04:47:38,295 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 04:47:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 38439 states and 159372 transitions. [2021-04-15 04:47:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:38,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:38,369 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 04:47:38,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 04:47:38,570 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:38,570 INFO L82 PathProgramCache]: Analyzing trace with hash -463391085, now seen corresponding path program 57 times [2021-04-15 04:47:38,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:38,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669899174] [2021-04-15 04:47:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:39,560 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 04:47:39,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669899174] [2021-04-15 04:47:39,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019347458] [2021-04-15 04:47:39,560 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 04:47:39,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:47:39,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:39,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-04-15 04:47:39,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:40,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:40,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:40,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-04-15 04:47:40,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:40,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:40,151 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 04:47:40,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:112 [2021-04-15 04:47:40,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:40,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 45 [2021-04-15 04:47:40,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:40,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:40,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:40,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:54 [2021-04-15 04:47:40,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:40,412 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 04:47:40,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:40,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:47:40,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:40,475 INFO L628 ElimStorePlain]: treesize reduction 25, result has 57.6 percent of original size [2021-04-15 04:47:40,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:40,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:97, output treesize:34 [2021-04-15 04:47:40,718 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 04:47:40,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-04-15 04:47:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010208060] [2021-04-15 04:47:40,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:47:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:47:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:47:40,719 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 04:47:42,233 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:47:43,083 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-04-15 04:47:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:45,339 INFO L93 Difference]: Finished difference Result 63331 states and 257800 transitions. [2021-04-15 04:47:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:47:45,341 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 04:47:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:45,568 INFO L225 Difference]: With dead ends: 63331 [2021-04-15 04:47:45,569 INFO L226 Difference]: Without dead ends: 63183 [2021-04-15 04:47:45,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 3880.3ms TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 04:47:45,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63183 states. [2021-04-15 04:47:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63183 to 38679. [2021-04-15 04:47:46,615 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 04:47:46,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38679 states to 38679 states and 160262 transitions. [2021-04-15 04:47:46,740 INFO L78 Accepts]: Start accepts. Automaton has 38679 states and 160262 transitions. Word has length 39 [2021-04-15 04:47:46,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:46,740 INFO L480 AbstractCegarLoop]: Abstraction has 38679 states and 160262 transitions. [2021-04-15 04:47:46,740 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 04:47:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 38679 states and 160262 transitions. [2021-04-15 04:47:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:46,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:46,816 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 04:47:47,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 04:47:47,016 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:47,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2145227995, now seen corresponding path program 58 times [2021-04-15 04:47:47,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:47,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701464699] [2021-04-15 04:47:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:47,642 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 04:47:47,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701464699] [2021-04-15 04:47:47,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89530543] [2021-04-15 04:47:47,643 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 04:47:47,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:47:47,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:47:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:48,017 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:47:48,017 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 04:47:48,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:48,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:48,029 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 04:47:48,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:47:48,085 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 04:47:48,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:48,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:48,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:47:48,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:47:48,160 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 04:47:48,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:48,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:47:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189322001] [2021-04-15 04:47:48,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:47:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:47:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:47:48,162 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 04:47:51,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:47:51,965 INFO L93 Difference]: Finished difference Result 81718 states and 332147 transitions. [2021-04-15 04:47:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:47:51,966 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 04:47:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:47:52,235 INFO L225 Difference]: With dead ends: 81718 [2021-04-15 04:47:52,235 INFO L226 Difference]: Without dead ends: 81494 [2021-04-15 04:47:52,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2156.7ms TimeCoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:47:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81494 states. [2021-04-15 04:47:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81494 to 38631. [2021-04-15 04:47:53,467 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 04:47:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38631 states to 38631 states and 160082 transitions. [2021-04-15 04:47:53,591 INFO L78 Accepts]: Start accepts. Automaton has 38631 states and 160082 transitions. Word has length 39 [2021-04-15 04:47:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:47:53,591 INFO L480 AbstractCegarLoop]: Abstraction has 38631 states and 160082 transitions. [2021-04-15 04:47:53,591 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 04:47:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 38631 states and 160082 transitions. [2021-04-15 04:47:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:47:53,667 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:47:53,667 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 04:47:53,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:47:53,868 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:47:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:47:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1553694967, now seen corresponding path program 59 times [2021-04-15 04:47:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:47:53,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827990879] [2021-04-15 04:47:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:47:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:47:54,217 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-04-15 04:47:54,689 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 04:47:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827990879] [2021-04-15 04:47:54,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90718517] [2021-04-15 04:47:54,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:47:54,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:47:54,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:47:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:47:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:47:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:55,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:47:55,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:55,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:55,460 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 04:47:55,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:98 [2021-04-15 04:47:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:55,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:47:55,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:47:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:47:55,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:47:55,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-04-15 04:47:55,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:55,688 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 04:47:55,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:47:55,826 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-04-15 04:47:55,827 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-04-15 04:47:55,838 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 04:47:55,838 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-04-15 04:47:56,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:56,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:47:56,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:56,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:47:56,117 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:47:56,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:47:56,135 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 04:47:56,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:47:56,222 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 04:47:56,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:47:56,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:47:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956279607] [2021-04-15 04:47:56,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:47:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:47:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:47:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:47:56,223 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 04:48:00,864 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-04-15 04:48:02,165 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-04-15 04:48:02,795 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-04-15 04:48:06,297 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-04-15 04:48:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:08,318 INFO L93 Difference]: Finished difference Result 93198 states and 377973 transitions. [2021-04-15 04:48:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-04-15 04:48:08,320 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 04:48:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:08,616 INFO L225 Difference]: With dead ends: 93198 [2021-04-15 04:48:08,617 INFO L226 Difference]: Without dead ends: 92715 [2021-04-15 04:48:08,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2767 ImplicationChecksByTransitivity, 7347.5ms TimeCoverageRelationStatistics Valid=1346, Invalid=7774, Unknown=0, NotChecked=0, Total=9120 [2021-04-15 04:48:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92715 states. [2021-04-15 04:48:09,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92715 to 38799. [2021-04-15 04:48:09,902 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 04:48:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38799 states to 38799 states and 160742 transitions. [2021-04-15 04:48:10,037 INFO L78 Accepts]: Start accepts. Automaton has 38799 states and 160742 transitions. Word has length 39 [2021-04-15 04:48:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:10,037 INFO L480 AbstractCegarLoop]: Abstraction has 38799 states and 160742 transitions. [2021-04-15 04:48:10,037 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 04:48:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 38799 states and 160742 transitions. [2021-04-15 04:48:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:10,119 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:10,119 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 04:48:10,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:10,325 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1757615713, now seen corresponding path program 60 times [2021-04-15 04:48:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:10,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327288906] [2021-04-15 04:48:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:10,901 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 04:48:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327288906] [2021-04-15 04:48:10,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957354100] [2021-04-15 04:48:10,902 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 04:48:10,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:48:10,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 04:48:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:11,353 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 04:48:11,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:11,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:11,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:11,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:43 [2021-04-15 04:48:11,429 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:48:11,430 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 04:48:11,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:11,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:11,438 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 04:48:11,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-04-15 04:48:11,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:11,489 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 04:48:11,492 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 04:48:11,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:11,501 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 04:48:11,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-04-15 04:48:11,556 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 04:48:11,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:11,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:48:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877461320] [2021-04-15 04:48:11,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:48:11,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:48:11,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:48:11,557 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 04:48:11,963 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:48:14,459 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-04-15 04:48:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:15,959 INFO L93 Difference]: Finished difference Result 67047 states and 273559 transitions. [2021-04-15 04:48:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:48:15,961 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 04:48:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:16,394 INFO L225 Difference]: With dead ends: 67047 [2021-04-15 04:48:16,394 INFO L226 Difference]: Without dead ends: 66957 [2021-04-15 04:48:16,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2630.3ms TimeCoverageRelationStatistics Valid=382, Invalid=1780, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:48:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66957 states. [2021-04-15 04:48:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66957 to 38963. [2021-04-15 04:48:17,234 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 04:48:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38963 states to 38963 states and 161396 transitions. [2021-04-15 04:48:17,633 INFO L78 Accepts]: Start accepts. Automaton has 38963 states and 161396 transitions. Word has length 39 [2021-04-15 04:48:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:17,633 INFO L480 AbstractCegarLoop]: Abstraction has 38963 states and 161396 transitions. [2021-04-15 04:48:17,633 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 04:48:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 38963 states and 161396 transitions. [2021-04-15 04:48:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:17,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:17,742 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 04:48:17,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:17,942 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 159853789, now seen corresponding path program 61 times [2021-04-15 04:48:17,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:17,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373061153] [2021-04-15 04:48:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:18,554 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 04:48:18,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373061153] [2021-04-15 04:48:18,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35982736] [2021-04-15 04:48:18,555 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 04:48:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:18,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:48:18,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:19,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:48:19,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:19,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:19,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:19,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:48:19,072 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:48:19,073 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 04:48:19,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:19,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:19,077 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 04:48:19,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:48:19,166 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 04:48:19,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:19,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:48:19,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930704702] [2021-04-15 04:48:19,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:48:19,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:19,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:48:19,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:48:19,168 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 04:48:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:23,318 INFO L93 Difference]: Finished difference Result 99416 states and 403744 transitions. [2021-04-15 04:48:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:48:23,320 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 04:48:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:23,681 INFO L225 Difference]: With dead ends: 99416 [2021-04-15 04:48:23,681 INFO L226 Difference]: Without dead ends: 99280 [2021-04-15 04:48:23,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2342.3ms TimeCoverageRelationStatistics Valid=446, Invalid=2004, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:48:23,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99280 states. [2021-04-15 04:48:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99280 to 38539. [2021-04-15 04:48:25,124 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 04:48:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38539 states to 38539 states and 159746 transitions. [2021-04-15 04:48:25,259 INFO L78 Accepts]: Start accepts. Automaton has 38539 states and 159746 transitions. Word has length 39 [2021-04-15 04:48:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:25,260 INFO L480 AbstractCegarLoop]: Abstraction has 38539 states and 159746 transitions. [2021-04-15 04:48:25,260 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 04:48:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 38539 states and 159746 transitions. [2021-04-15 04:48:25,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:25,337 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:25,337 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 04:48:25,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:48:25,538 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:25,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1095343571, now seen corresponding path program 62 times [2021-04-15 04:48:25,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:25,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973189106] [2021-04-15 04:48:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:26,177 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 04:48:26,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973189106] [2021-04-15 04:48:26,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193965536] [2021-04-15 04:48:26,178 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 04:48:26,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:48:26,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:26,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:48:26,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:26,572 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:48:26,572 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 04:48:26,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:26,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:26,586 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 04:48:26,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:48:26,705 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 04:48:26,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:26,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:26,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:26,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:48:26,796 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 04:48:26,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:26,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:48:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557012881] [2021-04-15 04:48:26,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:48:26,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:48:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:48:26,797 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 04:48:27,227 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-04-15 04:48:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:29,904 INFO L93 Difference]: Finished difference Result 66725 states and 273315 transitions. [2021-04-15 04:48:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:48:29,905 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 04:48:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:30,121 INFO L225 Difference]: With dead ends: 66725 [2021-04-15 04:48:30,121 INFO L226 Difference]: Without dead ends: 66533 [2021-04-15 04:48:30,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2268.0ms TimeCoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:48:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66533 states. [2021-04-15 04:48:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66533 to 38563. [2021-04-15 04:48:31,203 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 04:48:31,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38563 states to 38563 states and 159830 transitions. [2021-04-15 04:48:31,347 INFO L78 Accepts]: Start accepts. Automaton has 38563 states and 159830 transitions. Word has length 39 [2021-04-15 04:48:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:31,347 INFO L480 AbstractCegarLoop]: Abstraction has 38563 states and 159830 transitions. [2021-04-15 04:48:31,348 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 04:48:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 38563 states and 159830 transitions. [2021-04-15 04:48:31,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:31,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:31,430 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 04:48:31,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-04-15 04:48:31,631 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1049841687, now seen corresponding path program 63 times [2021-04-15 04:48:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:31,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594078430] [2021-04-15 04:48:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:32,346 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 04:48:32,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594078430] [2021-04-15 04:48:32,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164853248] [2021-04-15 04:48:32,347 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 04:48:32,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:48:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:32,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-04-15 04:48:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:33,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-04-15 04:48:33,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:33,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:33,732 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 04:48:33,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:63 [2021-04-15 04:48:33,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:33,986 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 04:48:33,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,031 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 04:48:34,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:112 [2021-04-15 04:48:34,213 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-04-15 04:48:34,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,486 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-04-15 04:48:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 04:48:34,490 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,499 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 04:48:34,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,524 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,524 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 04:48:34,528 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:48:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,582 INFO L354 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2021-04-15 04:48:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2021-04-15 04:48:34,586 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-04-15 04:48:34,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:48:34,617 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:48:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:34,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:48:34,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:48:34,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,656 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 04:48:34,659 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:48:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,684 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-04-15 04:48:34,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 1 [2021-04-15 04:48:34,686 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:34,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:34,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-04-15 04:48:34,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-04-15 04:48:35,062 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-04-15 04:48:35,062 INFO L628 ElimStorePlain]: treesize reduction 117, result has 51.5 percent of original size [2021-04-15 04:48:35,069 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 04:48:35,069 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:363, output treesize:128 [2021-04-15 04:48:35,237 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-04-15 04:48:35,489 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 04:48:35,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:35,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:48:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874617819] [2021-04-15 04:48:35,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:48:35,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:48:35,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:48:35,491 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 04:48:36,575 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-04-15 04:48:37,071 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-04-15 04:48:37,470 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-04-15 04:48:38,078 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-04-15 04:48:38,350 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-04-15 04:48:39,732 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-04-15 04:48:40,031 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:48:40,262 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-04-15 04:48:40,732 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-04-15 04:48:40,987 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-04-15 04:48:41,358 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-04-15 04:48:41,901 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-04-15 04:48:42,149 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-04-15 04:48:42,609 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-04-15 04:48:42,911 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-04-15 04:48:43,349 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-04-15 04:48:43,662 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-04-15 04:48:44,256 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-04-15 04:48:44,722 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-04-15 04:48:45,012 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-04-15 04:48:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:45,764 INFO L93 Difference]: Finished difference Result 69019 states and 280817 transitions. [2021-04-15 04:48:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:48:45,766 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 04:48:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:45,977 INFO L225 Difference]: With dead ends: 69019 [2021-04-15 04:48:45,977 INFO L226 Difference]: Without dead ends: 68871 [2021-04-15 04:48:45,978 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 8407.5ms TimeCoverageRelationStatistics Valid=940, Invalid=4912, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 04:48:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68871 states. [2021-04-15 04:48:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68871 to 38767. [2021-04-15 04:48:46,838 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 04:48:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38767 states to 38767 states and 160600 transitions. [2021-04-15 04:48:47,227 INFO L78 Accepts]: Start accepts. Automaton has 38767 states and 160600 transitions. Word has length 39 [2021-04-15 04:48:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:47,227 INFO L480 AbstractCegarLoop]: Abstraction has 38767 states and 160600 transitions. [2021-04-15 04:48:47,227 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 04:48:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 38767 states and 160600 transitions. [2021-04-15 04:48:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:47,307 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:47,307 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 04:48:47,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 04:48:47,509 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1563288699, now seen corresponding path program 64 times [2021-04-15 04:48:47,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:47,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189169346] [2021-04-15 04:48:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:48,232 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 04:48:48,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189169346] [2021-04-15 04:48:48,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771013785] [2021-04-15 04:48:48,233 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 04:48:48,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:48:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:48:48,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:48,730 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:48:48,730 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 04:48:48,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:48,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:48,748 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 04:48:48,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:48:48,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-04-15 04:48:48,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:48,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:48,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:48:48,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:48:48,918 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 04:48:48,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:48,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:48:48,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110005895] [2021-04-15 04:48:48,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:48:48,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:48,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:48:48,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:48:48,919 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 04:48:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:48:52,985 INFO L93 Difference]: Finished difference Result 81937 states and 333038 transitions. [2021-04-15 04:48:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:48:52,987 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 04:48:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:48:53,275 INFO L225 Difference]: With dead ends: 81937 [2021-04-15 04:48:53,276 INFO L226 Difference]: Without dead ends: 81713 [2021-04-15 04:48:53,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 2676.8ms TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:48:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81713 states. [2021-04-15 04:48:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81713 to 38719. [2021-04-15 04:48:54,537 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 04:48:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38719 states to 38719 states and 160420 transitions. [2021-04-15 04:48:54,684 INFO L78 Accepts]: Start accepts. Automaton has 38719 states and 160420 transitions. Word has length 39 [2021-04-15 04:48:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:48:54,685 INFO L480 AbstractCegarLoop]: Abstraction has 38719 states and 160420 transitions. [2021-04-15 04:48:54,685 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 04:48:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 38719 states and 160420 transitions. [2021-04-15 04:48:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:48:54,775 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:48:54,775 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 04:48:54,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-04-15 04:48:54,976 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:48:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:48:54,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1373542401, now seen corresponding path program 65 times [2021-04-15 04:48:54,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:48:54,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451878068] [2021-04-15 04:48:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:48:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:48:55,692 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 04:48:55,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451878068] [2021-04-15 04:48:55,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061867026] [2021-04-15 04:48:55,693 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 04:48:55,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:48:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:48:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:48:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:48:56,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:56,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:48:56,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:56,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:56,646 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 04:48:56,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:95 [2021-04-15 04:48:56,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:48:56,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:56,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,844 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 04:48:56,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:48:56,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:56,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:56,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 59 [2021-04-15 04:48:56,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:48:57,353 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-04-15 04:48:57,353 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-04-15 04:48:57,366 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 04:48:57,366 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:156, output treesize:76 [2021-04-15 04:48:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:48:57,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:48:57,704 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:48:57,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:48:57,728 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 04:48:57,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:48:57,848 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 04:48:57,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:48:57,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:48:57,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264471541] [2021-04-15 04:48:57,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:48:57,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:48:57,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:48:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:48:57,850 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 04:48:59,087 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 04:48:59,662 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-04-15 04:49:01,423 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 04:49:02,106 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 04:49:02,438 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-04-15 04:49:02,758 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-04-15 04:49:03,705 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-04-15 04:49:04,182 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-04-15 04:49:04,486 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:49:04,918 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-04-15 04:49:07,150 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-04-15 04:49:07,696 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-04-15 04:49:07,870 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 04:49:08,784 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-04-15 04:49:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:10,927 INFO L93 Difference]: Finished difference Result 93148 states and 377918 transitions. [2021-04-15 04:49:10,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-04-15 04:49:10,929 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 04:49:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:11,417 INFO L225 Difference]: With dead ends: 93148 [2021-04-15 04:49:11,417 INFO L226 Difference]: Without dead ends: 92681 [2021-04-15 04:49:11,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 8852.0ms TimeCoverageRelationStatistics Valid=1205, Invalid=6805, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:49:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92681 states. [2021-04-15 04:49:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92681 to 38859. [2021-04-15 04:49:12,682 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 04:49:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38859 states to 38859 states and 160960 transitions. [2021-04-15 04:49:12,812 INFO L78 Accepts]: Start accepts. Automaton has 38859 states and 160960 transitions. Word has length 39 [2021-04-15 04:49:12,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:12,812 INFO L480 AbstractCegarLoop]: Abstraction has 38859 states and 160960 transitions. [2021-04-15 04:49:12,812 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 04:49:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 38859 states and 160960 transitions. [2021-04-15 04:49:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:12,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:12,891 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 04:49:13,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-04-15 04:49:13,101 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:13,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1169621655, now seen corresponding path program 66 times [2021-04-15 04:49:13,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:13,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363778503] [2021-04-15 04:49:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:13,899 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 04:49:13,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363778503] [2021-04-15 04:49:13,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098020221] [2021-04-15 04:49:13,899 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 04:49:13,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:49:13,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:13,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:49:13,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:14,773 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 04:49:14,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:14,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:14,806 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 04:49:14,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:47 [2021-04-15 04:49:14,908 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:14,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:49:14,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:14,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:14,929 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 04:49:14,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:16 [2021-04-15 04:49:15,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:49:15,012 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-04-15 04:49:15,016 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 04:49:15,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:15,028 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 04:49:15,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:3 [2021-04-15 04:49:15,104 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 04:49:15,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:15,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:49:15,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123767883] [2021-04-15 04:49:15,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:49:15,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:49:15,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:49:15,105 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 04:49:15,805 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:49:16,343 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 04:49:18,858 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-04-15 04:49:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:20,263 INFO L93 Difference]: Finished difference Result 66745 states and 272318 transitions. [2021-04-15 04:49:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:49:20,265 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 04:49:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:20,505 INFO L225 Difference]: With dead ends: 66745 [2021-04-15 04:49:20,505 INFO L226 Difference]: Without dead ends: 66655 [2021-04-15 04:49:20,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 3133.8ms TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:49:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66655 states. [2021-04-15 04:49:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66655 to 39027. [2021-04-15 04:49:21,656 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 04:49:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39027 states to 39027 states and 161620 transitions. [2021-04-15 04:49:21,796 INFO L78 Accepts]: Start accepts. Automaton has 39027 states and 161620 transitions. Word has length 39 [2021-04-15 04:49:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:21,797 INFO L480 AbstractCegarLoop]: Abstraction has 39027 states and 161620 transitions. [2021-04-15 04:49:21,797 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 04:49:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 39027 states and 161620 transitions. [2021-04-15 04:49:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:21,888 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:21,888 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 04:49:22,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-04-15 04:49:22,088 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1527583717, now seen corresponding path program 67 times [2021-04-15 04:49:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:22,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87981042] [2021-04-15 04:49:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:22,945 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 04:49:22,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87981042] [2021-04-15 04:49:22,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385006546] [2021-04-15 04:49:22,945 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 04:49:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:49:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:23,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 04:49:23,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:23,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:23,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:23,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:49:23,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:23,675 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 04:49:23,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:23,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:23,683 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 04:49:23,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:49:23,823 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 04:49:23,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:23,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:49:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949937420] [2021-04-15 04:49:23,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:49:23,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:49:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:49:23,824 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 04:49:24,657 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:49:25,039 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-04-15 04:49:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:28,911 INFO L93 Difference]: Finished difference Result 99611 states and 404417 transitions. [2021-04-15 04:49:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:49:28,913 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 04:49:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:29,581 INFO L225 Difference]: With dead ends: 99611 [2021-04-15 04:49:29,582 INFO L226 Difference]: Without dead ends: 99475 [2021-04-15 04:49:29,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3431.2ms TimeCoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:49:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99475 states. [2021-04-15 04:49:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99475 to 38559. [2021-04-15 04:49:30,992 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 04:49:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38559 states to 38559 states and 159816 transitions. [2021-04-15 04:49:31,127 INFO L78 Accepts]: Start accepts. Automaton has 38559 states and 159816 transitions. Word has length 39 [2021-04-15 04:49:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:31,128 INFO L480 AbstractCegarLoop]: Abstraction has 38559 states and 159816 transitions. [2021-04-15 04:49:31,128 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 04:49:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 38559 states and 159816 transitions. [2021-04-15 04:49:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:31,204 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:31,204 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 04:49:31,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-04-15 04:49:31,405 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:31,405 INFO L82 PathProgramCache]: Analyzing trace with hash -912086607, now seen corresponding path program 68 times [2021-04-15 04:49:31,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:31,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404921337] [2021-04-15 04:49:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:32,075 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 04:49:32,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404921337] [2021-04-15 04:49:32,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349905216] [2021-04-15 04:49:32,075 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 04:49:32,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:49:32,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:32,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:49:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:32,554 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:32,555 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 04:49:32,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:32,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:32,575 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 04:49:32,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-04-15 04:49:32,652 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 04:49:32,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:32,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:32,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:32,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:18 [2021-04-15 04:49:32,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:32,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:49:32,826 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:49:32,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:32,848 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 04:49:32,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:49:32,944 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 04:49:32,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:32,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:49:32,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668871088] [2021-04-15 04:49:32,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:49:32,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:49:32,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:49:32,945 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 04:49:34,275 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-04-15 04:49:34,719 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-04-15 04:49:35,181 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-04-15 04:49:35,519 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-04-15 04:49:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:38,427 INFO L93 Difference]: Finished difference Result 85936 states and 353751 transitions. [2021-04-15 04:49:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:49:38,429 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 04:49:38,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:38,708 INFO L225 Difference]: With dead ends: 85936 [2021-04-15 04:49:38,708 INFO L226 Difference]: Without dead ends: 85881 [2021-04-15 04:49:38,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 3179.8ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:49:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85881 states. [2021-04-15 04:49:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85881 to 39379. [2021-04-15 04:49:39,964 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 04:49:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39379 states to 39379 states and 163064 transitions. [2021-04-15 04:49:40,100 INFO L78 Accepts]: Start accepts. Automaton has 39379 states and 163064 transitions. Word has length 39 [2021-04-15 04:49:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:40,100 INFO L480 AbstractCegarLoop]: Abstraction has 39379 states and 163064 transitions. [2021-04-15 04:49:40,100 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 04:49:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 39379 states and 163064 transitions. [2021-04-15 04:49:40,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:40,182 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:40,183 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 04:49:40,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:40,398 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash -659404043, now seen corresponding path program 69 times [2021-04-15 04:49:40,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:40,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011628582] [2021-04-15 04:49:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:41,174 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 04:49:41,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011628582] [2021-04-15 04:49:41,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755232053] [2021-04-15 04:49:41,175 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 04:49:41,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:49:41,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:49:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:41,556 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-04-15 04:49:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:49:41,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:41,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-04-15 04:49:41,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:42,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:42,032 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 04:49:42,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:93 [2021-04-15 04:49:42,284 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 04:49:42,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:42,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:42,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:42,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:49:42,416 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 04:49:42,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:42,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:49:42,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400806912] [2021-04-15 04:49:42,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:49:42,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:49:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:49:42,417 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 04:49:43,453 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-04-15 04:49:44,821 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-04-15 04:49:45,625 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-04-15 04:49:45,803 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:49:46,147 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-04-15 04:49:46,608 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-04-15 04:49:47,275 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-04-15 04:49:47,812 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-04-15 04:49:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:49,390 INFO L93 Difference]: Finished difference Result 84759 states and 343708 transitions. [2021-04-15 04:49:49,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-04-15 04:49:49,393 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 04:49:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:49,670 INFO L225 Difference]: With dead ends: 84759 [2021-04-15 04:49:49,670 INFO L226 Difference]: Without dead ends: 84511 [2021-04-15 04:49:49,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 5044.2ms TimeCoverageRelationStatistics Valid=511, Invalid=3271, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:49:49,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84511 states. [2021-04-15 04:49:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84511 to 39565. [2021-04-15 04:49:50,871 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 04:49:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39565 states to 39565 states and 163794 transitions. [2021-04-15 04:49:51,020 INFO L78 Accepts]: Start accepts. Automaton has 39565 states and 163794 transitions. Word has length 39 [2021-04-15 04:49:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:51,020 INFO L480 AbstractCegarLoop]: Abstraction has 39565 states and 163794 transitions. [2021-04-15 04:49:51,020 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 04:49:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 39565 states and 163794 transitions. [2021-04-15 04:49:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:51,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:51,102 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 04:49:51,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-04-15 04:49:51,302 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2069317459, now seen corresponding path program 70 times [2021-04-15 04:49:51,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:51,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880880354] [2021-04-15 04:49:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:49:51,960 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 04:49:51,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880880354] [2021-04-15 04:49:51,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926035411] [2021-04-15 04:49:51,960 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 04:49:51,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:49:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:49:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:49:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:49:52,535 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 04:49:52,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:52,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:52,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:49:52,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:49:52,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:49:52,660 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 04:49:52,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:49:52,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:49:52,670 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 04:49:52,670 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-04-15 04:49:52,823 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 04:49:52,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:49:52,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-04-15 04:49:52,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379545628] [2021-04-15 04:49:52,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-04-15 04:49:52,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:49:52,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-04-15 04:49:52,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:49:52,824 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 04:49:55,200 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-04-15 04:49:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:49:58,020 INFO L93 Difference]: Finished difference Result 80823 states and 332842 transitions. [2021-04-15 04:49:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:49:58,023 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 04:49:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:49:58,272 INFO L225 Difference]: With dead ends: 80823 [2021-04-15 04:49:58,272 INFO L226 Difference]: Without dead ends: 80768 [2021-04-15 04:49:58,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2418.8ms TimeCoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 04:49:58,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80768 states. [2021-04-15 04:49:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80768 to 40133. [2021-04-15 04:49:59,495 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 04:49:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40133 states to 40133 states and 166258 transitions. [2021-04-15 04:49:59,634 INFO L78 Accepts]: Start accepts. Automaton has 40133 states and 166258 transitions. Word has length 39 [2021-04-15 04:49:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:49:59,634 INFO L480 AbstractCegarLoop]: Abstraction has 40133 states and 166258 transitions. [2021-04-15 04:49:59,634 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 04:49:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 40133 states and 166258 transitions. [2021-04-15 04:49:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:49:59,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:49:59,713 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 04:49:59,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:49:59,914 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:49:59,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:49:59,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1588061807, now seen corresponding path program 71 times [2021-04-15 04:49:59,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:49:59,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694091137] [2021-04-15 04:49:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:49:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:00,669 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 04:50:00,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694091137] [2021-04-15 04:50:00,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542032609] [2021-04-15 04:50:00,670 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 04:50:00,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:50:00,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:50:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 04:50:00,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:01,029 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-04-15 04:50:01,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:50:01,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:01,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-04-15 04:50:01,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:01,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:01,908 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 04:50:01,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:72 [2021-04-15 04:50:02,445 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:50:03,635 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-04-15 04:50:03,835 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_32, v_prenex_30, v_prenex_34], 3=[q1]} [2021-04-15 04:50:03,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:03,864 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 04:50:03,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:50:04,072 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-04-15 04:50:04,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,099 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 22 treesize of output 24 [2021-04-15 04:50:04,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 04:50:04,293 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-04-15 04:50:04,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,317 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 04:50:04,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:50:04,520 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-04-15 04:50:04,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:50:04,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:04,826 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-04-15 04:50:04,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:04,895 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 04:50:04,895 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 15 variables, input treesize:216, output treesize:104 [2021-04-15 04:50:05,114 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:50:05,358 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:50:05,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:50:05,547 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 04:50:05,551 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 04:50:05,619 INFO L628 ElimStorePlain]: treesize reduction 14, result has 68.9 percent of original size [2021-04-15 04:50:05,622 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 04:50:05,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:21 [2021-04-15 04:50:05,751 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 04:50:05,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:05,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:50:05,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744230548] [2021-04-15 04:50:05,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:50:05,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:05,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:50:05,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:50:05,752 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 04:50:06,038 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:50:06,289 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:50:06,934 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2021-04-15 04:50:07,416 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-04-15 04:50:07,956 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-04-15 04:50:08,626 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-04-15 04:50:09,109 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-04-15 04:50:09,640 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-04-15 04:50:10,841 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-04-15 04:50:11,352 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-04-15 04:50:11,704 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 64 [2021-04-15 04:50:12,385 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-04-15 04:50:12,790 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 04:50:13,264 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-04-15 04:50:13,496 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-04-15 04:50:14,396 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2021-04-15 04:50:14,837 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-04-15 04:50:15,274 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-04-15 04:50:15,907 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 72 [2021-04-15 04:50:17,180 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2021-04-15 04:50:17,658 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-04-15 04:50:18,264 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2021-04-15 04:50:18,486 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-04-15 04:50:18,997 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-04-15 04:50:19,349 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2021-04-15 04:50:19,534 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-04-15 04:50:19,909 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-04-15 04:50:20,923 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-04-15 04:50:21,222 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-04-15 04:50:21,672 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-04-15 04:50:21,934 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 04:50:22,374 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-04-15 04:50:22,903 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-04-15 04:50:24,400 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-04-15 04:50:24,961 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-04-15 04:50:25,665 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-04-15 04:50:26,298 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-04-15 04:50:26,999 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-04-15 04:50:27,747 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2021-04-15 04:50:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:28,230 INFO L93 Difference]: Finished difference Result 90147 states and 367709 transitions. [2021-04-15 04:50:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 04:50:28,232 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 04:50:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:28,553 INFO L225 Difference]: With dead ends: 90147 [2021-04-15 04:50:28,553 INFO L226 Difference]: Without dead ends: 90014 [2021-04-15 04:50:28,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 17987.6ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:50:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90014 states. [2021-04-15 04:50:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90014 to 41032. [2021-04-15 04:50:29,786 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 04:50:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41032 states to 41032 states and 169978 transitions. [2021-04-15 04:50:30,159 INFO L78 Accepts]: Start accepts. Automaton has 41032 states and 169978 transitions. Word has length 39 [2021-04-15 04:50:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:30,159 INFO L480 AbstractCegarLoop]: Abstraction has 41032 states and 169978 transitions. [2021-04-15 04:50:30,160 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 04:50:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41032 states and 169978 transitions. [2021-04-15 04:50:30,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:50:30,247 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:50:30,247 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 04:50:30,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-04-15 04:50:30,449 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:50:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:50:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1287912465, now seen corresponding path program 72 times [2021-04-15 04:50:30,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:50:30,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991158401] [2021-04-15 04:50:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:50:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:31,216 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 04:50:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991158401] [2021-04-15 04:50:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598712278] [2021-04-15 04:50:31,217 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 04:50:31,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:50:31,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:50:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:50:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:31,825 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 04:50:31,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:31,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:31,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:31,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:50:32,062 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:50:32,062 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 04:50:32,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:32,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:32,071 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 04:50:32,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:50:32,194 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 04:50:32,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:32,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:50:32,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233979099] [2021-04-15 04:50:32,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:50:32,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:50:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:50:32,195 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 04:50:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:37,727 INFO L93 Difference]: Finished difference Result 88681 states and 365549 transitions. [2021-04-15 04:50:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:50:37,729 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 04:50:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:38,028 INFO L225 Difference]: With dead ends: 88681 [2021-04-15 04:50:38,029 INFO L226 Difference]: Without dead ends: 88626 [2021-04-15 04:50:38,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2643.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-04-15 04:50:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88626 states. [2021-04-15 04:50:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88626 to 41169. [2021-04-15 04:50:39,373 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 04:50:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41169 states to 41169 states and 170685 transitions. [2021-04-15 04:50:39,518 INFO L78 Accepts]: Start accepts. Automaton has 41169 states and 170685 transitions. Word has length 39 [2021-04-15 04:50:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:39,518 INFO L480 AbstractCegarLoop]: Abstraction has 41169 states and 170685 transitions. [2021-04-15 04:50:39,518 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 04:50:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 41169 states and 170685 transitions. [2021-04-15 04:50:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:50:39,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:50:39,603 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 04:50:39,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:50:39,803 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:50:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:50:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2097715607, now seen corresponding path program 73 times [2021-04-15 04:50:39,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:50:39,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896357833] [2021-04-15 04:50:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:50:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:40,518 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 04:50:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896357833] [2021-04-15 04:50:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878565152] [2021-04-15 04:50:40,518 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 04:50:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:40,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:50:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:41,063 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 04:50:41,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:41,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:41,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:41,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:50:41,263 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:50:41,264 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 04:50:41,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:41,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:41,271 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 04:50:41,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:50:41,413 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 04:50:41,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:41,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:50:41,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230585501] [2021-04-15 04:50:41,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:50:41,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:41,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:50:41,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:50:41,414 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 04:50:44,745 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-04-15 04:50:48,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:48,418 INFO L93 Difference]: Finished difference Result 123805 states and 502785 transitions. [2021-04-15 04:50:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:50:48,421 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 04:50:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:50:48,853 INFO L225 Difference]: With dead ends: 123805 [2021-04-15 04:50:48,853 INFO L226 Difference]: Without dead ends: 123750 [2021-04-15 04:50:48,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3827.8ms TimeCoverageRelationStatistics Valid=510, Invalid=2460, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:50:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123750 states. [2021-04-15 04:50:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123750 to 40312. [2021-04-15 04:50:50,527 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 04:50:50,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40312 states to 40312 states and 166867 transitions. [2021-04-15 04:50:50,663 INFO L78 Accepts]: Start accepts. Automaton has 40312 states and 166867 transitions. Word has length 39 [2021-04-15 04:50:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:50:50,663 INFO L480 AbstractCegarLoop]: Abstraction has 40312 states and 166867 transitions. [2021-04-15 04:50:50,664 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 04:50:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 40312 states and 166867 transitions. [2021-04-15 04:50:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:50:50,745 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:50:50,745 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 04:50:50,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:50:50,945 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:50:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:50:50,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1492735063, now seen corresponding path program 74 times [2021-04-15 04:50:50,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:50:50,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739299023] [2021-04-15 04:50:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:50:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:50:51,611 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:50:51,949 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 04:50:51,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739299023] [2021-04-15 04:50:51,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580188183] [2021-04-15 04:50:51,949 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 04:50:51,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:50:51,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:50:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:50:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:50:52,601 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 04:50:53,055 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:50:53,056 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 04:50:53,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:53,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:53,081 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 04:50:53,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-04-15 04:50:53,190 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 04:50:53,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:50:53,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:50:53,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:50:53,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:50:53,359 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 04:50:53,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:50:53,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:50:53,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661665589] [2021-04-15 04:50:53,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:50:53,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:50:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:50:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:50:53,360 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 04:50:54,287 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-04-15 04:50:54,802 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-04-15 04:50:55,440 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:50:56,505 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-04-15 04:50:57,652 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:50:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:50:59,873 INFO L93 Difference]: Finished difference Result 87552 states and 355793 transitions. [2021-04-15 04:50:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:50:59,875 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 04:50:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:51:00,166 INFO L225 Difference]: With dead ends: 87552 [2021-04-15 04:51:00,166 INFO L226 Difference]: Without dead ends: 87320 [2021-04-15 04:51:00,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 4324.6ms TimeCoverageRelationStatistics Valid=441, Invalid=2211, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:51:00,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87320 states. [2021-04-15 04:51:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87320 to 40364. [2021-04-15 04:51:01,484 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 04:51:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40364 states to 40364 states and 167069 transitions. [2021-04-15 04:51:01,637 INFO L78 Accepts]: Start accepts. Automaton has 40364 states and 167069 transitions. Word has length 39 [2021-04-15 04:51:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:51:01,637 INFO L480 AbstractCegarLoop]: Abstraction has 40364 states and 167069 transitions. [2021-04-15 04:51:01,637 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 04:51:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 40364 states and 167069 transitions. [2021-04-15 04:51:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:01,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:01,729 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 04:51:01,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-04-15 04:51:01,930 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:01,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2088779397, now seen corresponding path program 75 times [2021-04-15 04:51:01,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:01,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707397916] [2021-04-15 04:51:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:02,654 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:51:02,903 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 04:51:02,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707397916] [2021-04-15 04:51:02,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099751128] [2021-04-15 04:51:02,903 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 04:51:02,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:51:02,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:51:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:51:03,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:03,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:51:03,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:04,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-04-15 04:51:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:04,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:04,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-04-15 04:51:04,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:04,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-04-15 04:51:04,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,496 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:51:04,496 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 04:51:04,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,532 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:51:04,532 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 04:51:04,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:04,756 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:51:04,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:04,771 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 04:51:04,772 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:255 [2021-04-15 04:51:05,148 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 04:51:05,587 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 04:51:05,864 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 04:51:05,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:51:05,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:51:05,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644686285] [2021-04-15 04:51:05,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:51:05,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:51:05,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:51:05,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:51:05,865 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 04:51:06,802 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-04-15 04:51:07,736 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:51:09,195 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-04-15 04:51:09,964 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-04-15 04:51:10,226 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:51:11,016 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:51:11,281 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 04:51:11,492 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:51:12,000 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:51:12,317 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-04-15 04:51:12,747 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-04-15 04:51:13,072 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:51:13,473 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:51:13,938 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-04-15 04:51:14,129 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:51:14,345 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:51:14,578 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:51:14,874 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-04-15 04:51:15,319 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-04-15 04:51:15,611 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-04-15 04:51:15,838 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 04:51:16,546 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:51:17,346 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:51:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:51:17,914 INFO L93 Difference]: Finished difference Result 79215 states and 320364 transitions. [2021-04-15 04:51:17,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 04:51:17,917 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 04:51:17,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:51:18,184 INFO L225 Difference]: With dead ends: 79215 [2021-04-15 04:51:18,184 INFO L226 Difference]: Without dead ends: 78957 [2021-04-15 04:51:18,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 9946.6ms TimeCoverageRelationStatistics Valid=801, Invalid=4311, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:51:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78957 states. [2021-04-15 04:51:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78957 to 40390. [2021-04-15 04:51:19,314 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 04:51:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40390 states to 40390 states and 167183 transitions. [2021-04-15 04:51:19,445 INFO L78 Accepts]: Start accepts. Automaton has 40390 states and 167183 transitions. Word has length 39 [2021-04-15 04:51:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:51:19,445 INFO L480 AbstractCegarLoop]: Abstraction has 40390 states and 167183 transitions. [2021-04-15 04:51:19,445 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 04:51:19,445 INFO L276 IsEmpty]: Start isEmpty. Operand 40390 states and 167183 transitions. [2021-04-15 04:51:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:19,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:19,524 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 04:51:19,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:51:19,725 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1884858651, now seen corresponding path program 76 times [2021-04-15 04:51:19,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:19,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434887948] [2021-04-15 04:51:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:20,510 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:51:20,829 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 04:51:20,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434887948] [2021-04-15 04:51:20,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756251451] [2021-04-15 04:51:20,829 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 04:51:20,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:51:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:51:20,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:51:21,609 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 37 treesize of output 29 [2021-04-15 04:51:21,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:21,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:21,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:51:21,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:51:21,756 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:51:21,756 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 04:51:21,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:21,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:21,766 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 04:51:21,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:51:21,939 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 04:51:21,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:51:21,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:51:21,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715513493] [2021-04-15 04:51:21,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:51:21,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:51:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:51:21,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:51:21,940 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 04:51:22,612 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:51:23,195 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:51:24,501 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-04-15 04:51:26,390 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:51:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:51:28,500 INFO L93 Difference]: Finished difference Result 75640 states and 308874 transitions. [2021-04-15 04:51:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 04:51:28,503 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 04:51:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:51:28,744 INFO L225 Difference]: With dead ends: 75640 [2021-04-15 04:51:28,744 INFO L226 Difference]: Without dead ends: 75550 [2021-04-15 04:51:28,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 3697.3ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:51:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75550 states. [2021-04-15 04:51:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75550 to 40506. [2021-04-15 04:51:29,930 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 04:51:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40506 states to 40506 states and 167679 transitions. [2021-04-15 04:51:30,069 INFO L78 Accepts]: Start accepts. Automaton has 40506 states and 167679 transitions. Word has length 39 [2021-04-15 04:51:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:51:30,069 INFO L480 AbstractCegarLoop]: Abstraction has 40506 states and 167679 transitions. [2021-04-15 04:51:30,069 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 04:51:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 40506 states and 167679 transitions. [2021-04-15 04:51:30,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:30,155 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:30,155 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 04:51:30,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:51:30,355 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:30,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:30,356 INFO L82 PathProgramCache]: Analyzing trace with hash 278457189, now seen corresponding path program 77 times [2021-04-15 04:51:30,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:30,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31689957] [2021-04-15 04:51:30,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:31,121 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:51:31,418 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 04:51:31,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31689957] [2021-04-15 04:51:31,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746439632] [2021-04-15 04:51:31,419 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 04:51:31,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:51:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 04:51:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:51:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:33,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:33,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-04-15 04:51:33,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:33,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:33,211 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 04:51:33,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:73 [2021-04-15 04:51:33,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:33,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:33,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 04:51:33,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:51:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:33,978 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 04:51:33,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:33,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:33,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:51:34,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:34,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 04:51:34,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:51:34,233 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-04-15 04:51:34,234 INFO L628 ElimStorePlain]: treesize reduction 25, result has 73.1 percent of original size [2021-04-15 04:51:34,249 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 04:51:34,249 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:154, output treesize:52 [2021-04-15 04:51:34,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:34,588 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 04:51:34,594 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:51:34,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:51:34,639 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 04:51:34,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-04-15 04:51:34,848 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 04:51:34,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:51:34,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-04-15 04:51:34,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924510057] [2021-04-15 04:51:34,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:51:34,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:51:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:51:34,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:51:34,850 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 04:51:35,230 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-04-15 04:51:35,524 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:51:35,848 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:51:36,204 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:51:37,237 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:51:37,542 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 04:51:38,607 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-04-15 04:51:39,159 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-04-15 04:51:40,482 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-04-15 04:51:40,754 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 04:51:41,651 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-04-15 04:51:42,648 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-04-15 04:51:43,023 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-04-15 04:51:43,399 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:51:43,808 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 04:51:44,332 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 04:51:44,587 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-04-15 04:51:44,840 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-04-15 04:51:45,205 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-04-15 04:51:45,554 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-04-15 04:51:46,178 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-04-15 04:51:47,094 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-04-15 04:51:47,666 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-04-15 04:51:49,341 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-04-15 04:51:50,793 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-04-15 04:51:51,140 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-04-15 04:51:51,967 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2021-04-15 04:51:52,223 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-04-15 04:51:53,403 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-04-15 04:51:54,764 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:51:55,446 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-04-15 04:51:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:51:56,199 INFO L93 Difference]: Finished difference Result 113735 states and 460760 transitions. [2021-04-15 04:51:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-04-15 04:51:56,202 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 04:51:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:51:56,613 INFO L225 Difference]: With dead ends: 113735 [2021-04-15 04:51:56,614 INFO L226 Difference]: Without dead ends: 113354 [2021-04-15 04:51:56,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 14523.4ms TimeCoverageRelationStatistics Valid=1285, Invalid=7645, Unknown=0, NotChecked=0, Total=8930 [2021-04-15 04:51:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113354 states. [2021-04-15 04:51:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113354 to 40488. [2021-04-15 04:51:58,192 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 04:51:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40488 states to 40488 states and 167593 transitions. [2021-04-15 04:51:58,338 INFO L78 Accepts]: Start accepts. Automaton has 40488 states and 167593 transitions. Word has length 39 [2021-04-15 04:51:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:51:58,338 INFO L480 AbstractCegarLoop]: Abstraction has 40488 states and 167593 transitions. [2021-04-15 04:51:58,338 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 04:51:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40488 states and 167593 transitions. [2021-04-15 04:51:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:51:58,424 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:51:58,424 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 04:51:58,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-04-15 04:51:58,624 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:51:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:51:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash -120548947, now seen corresponding path program 78 times [2021-04-15 04:51:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:51:58,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418512881] [2021-04-15 04:51:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:51:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:51:59,911 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 04:51:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418512881] [2021-04-15 04:51:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486250926] [2021-04-15 04:51:59,912 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 04:51:59,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:51:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:51:59,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 04:51:59,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:00,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:52:00,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:00,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:00,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:00,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-04-15 04:52:00,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:52:00,802 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 04:52:00,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:00,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:00,825 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 04:52:00,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:18 [2021-04-15 04:52:01,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:01,111 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 04:52:01,117 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:52:01,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:01,154 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 04:52:01,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-04-15 04:52:01,346 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 04:52:01,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:01,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:52:01,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792245503] [2021-04-15 04:52:01,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:52:01,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:01,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:52:01,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:52:01,348 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 04:52:02,024 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:52:03,187 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:52:03,537 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:52:04,786 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:52:06,709 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:52:07,522 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:52:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:52:09,316 INFO L93 Difference]: Finished difference Result 96582 states and 397880 transitions. [2021-04-15 04:52:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:52:09,319 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 04:52:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:52:09,634 INFO L225 Difference]: With dead ends: 96582 [2021-04-15 04:52:09,634 INFO L226 Difference]: Without dead ends: 96527 [2021-04-15 04:52:09,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 5238.7ms TimeCoverageRelationStatistics Valid=439, Invalid=2531, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:52:09,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96527 states. [2021-04-15 04:52:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96527 to 42316. [2021-04-15 04:52:11,038 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 04:52:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42316 states to 42316 states and 175149 transitions. [2021-04-15 04:52:11,181 INFO L78 Accepts]: Start accepts. Automaton has 42316 states and 175149 transitions. Word has length 39 [2021-04-15 04:52:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:52:11,181 INFO L480 AbstractCegarLoop]: Abstraction has 42316 states and 175149 transitions. [2021-04-15 04:52:11,181 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 04:52:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 42316 states and 175149 transitions. [2021-04-15 04:52:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:52:11,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:52:11,265 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 04:52:11,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:52:11,467 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:52:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:52:11,467 INFO L82 PathProgramCache]: Analyzing trace with hash -758136977, now seen corresponding path program 79 times [2021-04-15 04:52:11,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:52:11,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474460976] [2021-04-15 04:52:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:52:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:11,634 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-04-15 04:52:12,415 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 04:52:12,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474460976] [2021-04-15 04:52:12,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231271256] [2021-04-15 04:52:12,415 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 04:52:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:52:12,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:13,078 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 04:52:13,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:13,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:13,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:13,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:52:13,473 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:52:13,473 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 04:52:13,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:13,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:13,484 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 04:52:13,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:52:13,637 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 04:52:13,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:13,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:52:13,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076323104] [2021-04-15 04:52:13,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:52:13,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:13,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:52:13,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:52:13,638 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 04:52:15,572 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-04-15 04:52:15,936 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:52:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:52:21,651 INFO L93 Difference]: Finished difference Result 97967 states and 404050 transitions. [2021-04-15 04:52:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:52:21,654 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 04:52:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:52:22,337 INFO L225 Difference]: With dead ends: 97967 [2021-04-15 04:52:22,338 INFO L226 Difference]: Without dead ends: 97912 [2021-04-15 04:52:22,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 3743.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1623, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:52:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97912 states. [2021-04-15 04:52:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97912 to 44367. [2021-04-15 04:52:23,794 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 04:52:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44367 states to 44367 states and 183762 transitions. [2021-04-15 04:52:23,946 INFO L78 Accepts]: Start accepts. Automaton has 44367 states and 183762 transitions. Word has length 39 [2021-04-15 04:52:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:52:23,946 INFO L480 AbstractCegarLoop]: Abstraction has 44367 states and 183762 transitions. [2021-04-15 04:52:23,946 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 04:52:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 44367 states and 183762 transitions. [2021-04-15 04:52:24,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:52:24,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:52:24,046 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 04:52:24,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-04-15 04:52:24,247 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:52:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:52:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash 660856047, now seen corresponding path program 80 times [2021-04-15 04:52:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:52:24,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470472070] [2021-04-15 04:52:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:52:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:24,429 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:52:25,245 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 04:52:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470472070] [2021-04-15 04:52:25,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293600008] [2021-04-15 04:52:25,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:52:25,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:52:25,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:52:25,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:52:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:25,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:52:25,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:25,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:25,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:25,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:52:26,367 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:52:26,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:52:26,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:26,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:26,381 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 04:52:26,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:52:26,561 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 04:52:26,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:26,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:52:26,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051107528] [2021-04-15 04:52:26,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:52:26,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:26,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:52:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:52:26,562 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 04:52:28,234 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:52:28,616 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:52:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:52:33,070 INFO L93 Difference]: Finished difference Result 94017 states and 387403 transitions. [2021-04-15 04:52:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:52:33,075 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 04:52:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:52:33,400 INFO L225 Difference]: With dead ends: 94017 [2021-04-15 04:52:33,400 INFO L226 Difference]: Without dead ends: 93962 [2021-04-15 04:52:33,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 3591.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:52:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93962 states. [2021-04-15 04:52:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93962 to 43759. [2021-04-15 04:52:34,843 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 04:52:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43759 states to 43759 states and 181198 transitions. [2021-04-15 04:52:34,986 INFO L78 Accepts]: Start accepts. Automaton has 43759 states and 181198 transitions. Word has length 39 [2021-04-15 04:52:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:52:34,986 INFO L480 AbstractCegarLoop]: Abstraction has 43759 states and 181198 transitions. [2021-04-15 04:52:34,986 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 04:52:34,986 INFO L276 IsEmpty]: Start isEmpty. Operand 43759 states and 181198 transitions. [2021-04-15 04:52:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:52:35,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:52:35,074 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 04:52:35,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-04-15 04:52:35,275 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:52:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:52:35,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1354477999, now seen corresponding path program 81 times [2021-04-15 04:52:35,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:52:35,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919514631] [2021-04-15 04:52:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:52:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:35,477 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:52:36,298 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 04:52:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919514631] [2021-04-15 04:52:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797103000] [2021-04-15 04:52:36,298 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 04:52:36,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:52:36,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:52:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-04-15 04:52:36,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:37,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:37,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-04-15 04:52:37,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:37,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:37,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:37,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-04-15 04:52:38,139 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-04-15 04:52:38,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:38,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:52:38,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:52:38,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:38,671 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 04:52:38,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-04-15 04:52:38,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:52:38,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:38,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-04-15 04:52:38,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:38,938 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:52:38,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:38,957 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 04:52:38,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:183, output treesize:198 [2021-04-15 04:52:39,213 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:52:39,435 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 04:52:39,490 INFO L446 ElimStorePlain]: Different costs {0=[q2], 1=[v_prenex_36]} [2021-04-15 04:52:39,498 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 04:52:39,506 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 04:52:39,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:39,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:52:39,614 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 04:52:39,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:39,746 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-04-15 04:52:39,747 INFO L628 ElimStorePlain]: treesize reduction 13, result has 72.3 percent of original size [2021-04-15 04:52:39,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:52:39,749 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:32 [2021-04-15 04:52:40,010 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 04:52:40,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:40,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:52:40,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275709630] [2021-04-15 04:52:40,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:52:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:52:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:52:40,011 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 04:52:41,917 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:52:43,487 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-04-15 04:52:44,325 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 04:52:45,662 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-04-15 04:52:46,714 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-04-15 04:52:47,252 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 04:52:47,522 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-04-15 04:52:48,102 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 04:52:48,508 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-04-15 04:52:49,133 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-04-15 04:52:49,426 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-04-15 04:52:50,231 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-04-15 04:52:51,188 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:52:52,024 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-04-15 04:52:52,336 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-04-15 04:52:52,961 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-04-15 04:52:53,604 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-04-15 04:52:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:52:54,071 INFO L93 Difference]: Finished difference Result 85716 states and 351669 transitions. [2021-04-15 04:52:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:52:54,074 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 04:52:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:52:54,345 INFO L225 Difference]: With dead ends: 85716 [2021-04-15 04:52:54,345 INFO L226 Difference]: Without dead ends: 85634 [2021-04-15 04:52:54,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 9843.8ms TimeCoverageRelationStatistics Valid=461, Invalid=3571, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 04:52:54,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85634 states. [2021-04-15 04:52:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85634 to 43965. [2021-04-15 04:52:55,519 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 04:52:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43965 states to 43965 states and 181971 transitions. [2021-04-15 04:52:55,666 INFO L78 Accepts]: Start accepts. Automaton has 43965 states and 181971 transitions. Word has length 39 [2021-04-15 04:52:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:52:55,666 INFO L480 AbstractCegarLoop]: Abstraction has 43965 states and 181971 transitions. [2021-04-15 04:52:55,666 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 04:52:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 43965 states and 181971 transitions. [2021-04-15 04:52:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:52:55,750 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:52:55,750 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 04:52:55,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-04-15 04:52:55,957 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:52:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:52:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1521496273, now seen corresponding path program 82 times [2021-04-15 04:52:55,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:52:55,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349871967] [2021-04-15 04:52:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:52:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:52:56,126 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:52:56,867 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 04:52:56,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349871967] [2021-04-15 04:52:56,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350305622] [2021-04-15 04:52:56,867 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 04:52:56,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:52:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:52:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:52:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:52:57,456 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-04-15 04:52:57,752 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 04:52:57,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:57,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:57,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:52:57,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:52:58,183 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:52:58,184 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 04:52:58,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:52:58,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:52:58,195 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 04:52:58,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:52:58,359 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 04:52:58,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:52:58,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-04-15 04:52:58,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022907314] [2021-04-15 04:52:58,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 04:52:58,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:52:58,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 04:52:58,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:52:58,360 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 04:53:01,134 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:53:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:53:08,400 INFO L93 Difference]: Finished difference Result 94685 states and 390543 transitions. [2021-04-15 04:53:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:53:08,405 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 04:53:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:53:08,741 INFO L225 Difference]: With dead ends: 94685 [2021-04-15 04:53:08,741 INFO L226 Difference]: Without dead ends: 94630 [2021-04-15 04:53:08,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 3382.9ms TimeCoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:53:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94630 states. [2021-04-15 04:53:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94630 to 44548. [2021-04-15 04:53:10,102 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 04:53:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44548 states to 44548 states and 184545 transitions. [2021-04-15 04:53:10,268 INFO L78 Accepts]: Start accepts. Automaton has 44548 states and 184545 transitions. Word has length 39 [2021-04-15 04:53:10,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:53:10,268 INFO L480 AbstractCegarLoop]: Abstraction has 44548 states and 184545 transitions. [2021-04-15 04:53:10,268 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 04:53:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 44548 states and 184545 transitions. [2021-04-15 04:53:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:53:10,363 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:53:10,363 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 04:53:10,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:53:10,564 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:53:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:53:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash -855789521, now seen corresponding path program 83 times [2021-04-15 04:53:10,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:53:10,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268532508] [2021-04-15 04:53:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:53:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:53:10,790 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:53:11,633 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 04:53:11,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268532508] [2021-04-15 04:53:11,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976630495] [2021-04-15 04:53:11,633 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 04:53:11,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:53:11,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:53:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:53:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:53:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:12,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:12,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:53:12,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:12,915 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:53:12,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:12,943 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 04:53:12,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:87 [2021-04-15 04:53:14,204 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-04-15 04:53:15,241 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-04-15 04:53:15,999 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:53:16,452 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_54, v_prenex_57, v_prenex_48], 3=[q2, v_prenex_51]} [2021-04-15 04:53:16,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:16,469 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 04:53:16,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:16,747 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-04-15 04:53:16,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:16,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:16,766 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 04:53:16,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:17,030 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-04-15 04:53:17,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-04-15 04:53:17,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:17,299 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-04-15 04:53:17,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:17,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:53:17,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:17,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-04-15 04:53:17,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:17,540 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-04-15 04:53:17,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:17,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:53:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-04-15 04:53:17,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-04-15 04:53:17,771 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:53:17,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:17,782 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 04:53:17,782 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 17 variables, input treesize:204, output treesize:69 [2021-04-15 04:53:18,079 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-04-15 04:53:18,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:53:18,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:18,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2021-04-15 04:53:18,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-04-15 04:53:18,595 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-04-15 04:53:18,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:53:18,603 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 04:53:18,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:58 [2021-04-15 04:53:18,825 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:53:19,108 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 04:53:19,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:53:19,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:53:19,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827517920] [2021-04-15 04:53:19,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:53:19,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:53:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:53:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:53:19,109 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 04:53:19,524 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-04-15 04:53:19,810 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 04:53:20,146 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-04-15 04:53:20,946 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 30 [2021-04-15 04:53:21,637 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 37 [2021-04-15 04:53:22,636 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-04-15 04:53:23,551 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 44 [2021-04-15 04:53:24,782 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2021-04-15 04:53:25,569 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-04-15 04:53:26,265 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2021-04-15 04:53:26,914 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-04-15 04:53:27,688 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-04-15 04:53:28,462 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 48 [2021-04-15 04:53:29,043 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-04-15 04:53:29,597 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:53:30,108 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 50 [2021-04-15 04:53:31,301 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-04-15 04:53:32,006 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-04-15 04:53:32,958 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2021-04-15 04:53:33,426 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-04-15 04:53:34,026 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-04-15 04:53:34,957 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-04-15 04:53:35,995 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-04-15 04:53:36,757 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-04-15 04:53:37,779 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-04-15 04:53:38,954 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-04-15 04:53:39,922 WARN L205 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-04-15 04:53:40,386 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:53:41,216 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2021-04-15 04:53:41,852 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 04:53:43,298 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 107 DAG size of output: 105 [2021-04-15 04:53:44,715 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-04-15 04:53:45,509 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-04-15 04:53:45,990 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-04-15 04:53:46,736 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 04:53:47,509 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-04-15 04:53:48,569 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-04-15 04:53:49,338 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-04-15 04:53:50,203 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-04-15 04:53:51,266 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-04-15 04:53:52,459 WARN L205 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 04:53:52,810 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:53:53,289 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:53:53,789 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-04-15 04:53:54,876 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-04-15 04:53:56,052 WARN L205 SmtUtils]: Spent 738.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-04-15 04:53:56,790 WARN L205 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-04-15 04:53:57,394 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-04-15 04:53:58,604 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2021-04-15 04:53:59,393 WARN L205 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-04-15 04:53:59,758 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:54:00,145 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-04-15 04:54:00,901 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-04-15 04:54:01,695 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-04-15 04:54:02,232 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-04-15 04:54:03,884 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2021-04-15 04:54:04,649 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-04-15 04:54:05,628 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-04-15 04:54:06,145 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-04-15 04:54:07,057 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-04-15 04:54:07,890 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-04-15 04:54:09,266 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-04-15 04:54:10,129 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-04-15 04:54:10,940 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:54:11,610 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-04-15 04:54:12,543 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:54:13,909 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-04-15 04:54:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:54:14,543 INFO L93 Difference]: Finished difference Result 75247 states and 306248 transitions. [2021-04-15 04:54:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-04-15 04:54:14,548 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 04:54:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:54:14,786 INFO L225 Difference]: With dead ends: 75247 [2021-04-15 04:54:14,786 INFO L226 Difference]: Without dead ends: 75137 [2021-04-15 04:54:14,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 45017.1ms TimeCoverageRelationStatistics Valid=1384, Invalid=10172, Unknown=0, NotChecked=0, Total=11556 [2021-04-15 04:54:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75137 states. [2021-04-15 04:54:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75137 to 44898. [2021-04-15 04:54:15,968 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 04:54:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44898 states to 44898 states and 185938 transitions. [2021-04-15 04:54:16,128 INFO L78 Accepts]: Start accepts. Automaton has 44898 states and 185938 transitions. Word has length 39 [2021-04-15 04:54:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:54:16,128 INFO L480 AbstractCegarLoop]: Abstraction has 44898 states and 185938 transitions. [2021-04-15 04:54:16,128 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 04:54:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 44898 states and 185938 transitions. [2021-04-15 04:54:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:54:16,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:54:16,216 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 04:54:16,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-04-15 04:54:16,416 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:54:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:54:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1796157531, now seen corresponding path program 84 times [2021-04-15 04:54:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:54:16,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12993188] [2021-04-15 04:54:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:54:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:54:16,882 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:54:17,974 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 04:54:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12993188] [2021-04-15 04:54:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017282235] [2021-04-15 04:54:17,975 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 04:54:18,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:54:18,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:54:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:54:18,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:54:18,760 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 04:54:18,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:18,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:18,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:54:18,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2021-04-15 04:54:19,243 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:54:19,243 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 41 treesize of output 29 [2021-04-15 04:54:19,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:19,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:19,272 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 04:54:19,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:15 [2021-04-15 04:54:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:54:19,400 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 04:54:19,410 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 04:54:19,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:19,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:54:19,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:7 [2021-04-15 04:54:19,673 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 04:54:19,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:54:19,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-04-15 04:54:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867288821] [2021-04-15 04:54:19,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 04:54:19,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:54:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 04:54:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-04-15 04:54:19,674 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 04:54:19,929 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:54:20,177 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:20,461 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:20,724 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:54:22,293 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:22,616 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:54:22,852 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:54:23,088 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:54:23,610 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:54:24,053 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:54:25,071 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:54:25,363 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-04-15 04:54:26,493 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-04-15 04:54:27,806 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:54:28,145 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:54:28,378 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:54:29,015 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-04-15 04:54:29,845 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-04-15 04:54:30,565 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-04-15 04:54:31,936 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:54:33,947 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:54:34,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:54:34,777 INFO L93 Difference]: Finished difference Result 133245 states and 537511 transitions. [2021-04-15 04:54:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:54:34,783 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 04:54:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:54:35,294 INFO L225 Difference]: With dead ends: 133245 [2021-04-15 04:54:35,294 INFO L226 Difference]: Without dead ends: 132892 [2021-04-15 04:54:35,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 8922.5ms TimeCoverageRelationStatistics Valid=760, Invalid=3272, Unknown=0, NotChecked=0, Total=4032 [2021-04-15 04:54:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132892 states. [2021-04-15 04:54:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132892 to 48526. [2021-04-15 04:54:37,554 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 04:54:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48526 states to 48526 states and 200706 transitions. [2021-04-15 04:54:37,721 INFO L78 Accepts]: Start accepts. Automaton has 48526 states and 200706 transitions. Word has length 39 [2021-04-15 04:54:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:54:37,721 INFO L480 AbstractCegarLoop]: Abstraction has 48526 states and 200706 transitions. [2021-04-15 04:54:37,721 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 04:54:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 48526 states and 200706 transitions. [2021-04-15 04:54:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:54:37,819 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:54:37,819 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 04:54:38,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2021-04-15 04:54:38,020 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:54:38,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:54:38,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1950641299, now seen corresponding path program 85 times [2021-04-15 04:54:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:54:38,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339843360] [2021-04-15 04:54:38,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:54:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:54:38,267 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2021-04-15 04:54:39,162 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 04:54:39,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339843360] [2021-04-15 04:54:39,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395436642] [2021-04-15 04:54:39,163 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 04:54:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:54:39,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:54:39,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:54:39,876 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 04:54:39,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:39,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:39,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:54:39,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-04-15 04:54:40,171 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:54:40,171 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 04:54:40,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:40,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:40,185 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 04:54:40,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-04-15 04:54:40,490 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 04:54:40,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:54:40,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:54:40,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011367652] [2021-04-15 04:54:40,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:54:40,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:54:40,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:54:40,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:54:40,491 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 04:54:40,724 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:54:40,960 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:41,239 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:54:41,531 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:54:43,021 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-04-15 04:54:43,309 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:54:43,515 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:54:43,727 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:54:44,140 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-04-15 04:54:44,643 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-04-15 04:54:45,748 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:54:46,308 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:54:47,373 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:54:48,704 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:54:49,653 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:54:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:54:51,142 INFO L93 Difference]: Finished difference Result 139638 states and 567042 transitions. [2021-04-15 04:54:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:54:51,148 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 04:54:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:54:52,006 INFO L225 Difference]: With dead ends: 139638 [2021-04-15 04:54:52,007 INFO L226 Difference]: Without dead ends: 139583 [2021-04-15 04:54:52,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 6715.4ms TimeCoverageRelationStatistics Valid=524, Invalid=2446, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:54:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139583 states. [2021-04-15 04:54:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139583 to 48438. [2021-04-15 04:54:53,758 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 04:54:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48438 states to 48438 states and 200443 transitions. [2021-04-15 04:54:53,914 INFO L78 Accepts]: Start accepts. Automaton has 48438 states and 200443 transitions. Word has length 39 [2021-04-15 04:54:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:54:53,914 INFO L480 AbstractCegarLoop]: Abstraction has 48438 states and 200443 transitions. [2021-04-15 04:54:53,914 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 04:54:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 48438 states and 200443 transitions. [2021-04-15 04:54:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:54:54,005 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:54:54,005 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 04:54:54,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:54:54,205 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:54:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:54:54,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2070849197, now seen corresponding path program 86 times [2021-04-15 04:54:54,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:54:54,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024546485] [2021-04-15 04:54:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:54:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:54:54,448 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:54:55,076 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:54:55,353 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:54:55,555 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:54:55,888 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 04:54:55,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024546485] [2021-04-15 04:54:55,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973033162] [2021-04-15 04:54:55,888 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 04:54:55,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:54:55,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:54:55,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:54:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:54:56,538 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-04-15 04:54:57,300 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:54:57,300 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 04:54:57,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:57,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:57,338 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 04:54:57,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-04-15 04:54:57,495 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 04:54:57,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:54:57,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:54:57,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:54:57,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-04-15 04:54:57,737 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 04:54:57,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:54:57,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:54:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343697224] [2021-04-15 04:54:57,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:54:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:54:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:54:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:54:57,738 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 04:54:58,491 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:54:59,190 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-04-15 04:54:59,661 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:55:00,010 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:55:00,232 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:55:00,480 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:55:01,063 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:55:01,720 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:55:02,164 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-04-15 04:55:02,836 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-04-15 04:55:03,416 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:55:03,861 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:55:04,609 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 04:55:05,306 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:55:06,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:06,309 INFO L93 Difference]: Finished difference Result 83893 states and 343260 transitions. [2021-04-15 04:55:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 04:55:06,313 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 04:55:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:06,567 INFO L225 Difference]: With dead ends: 83893 [2021-04-15 04:55:06,567 INFO L226 Difference]: Without dead ends: 83645 [2021-04-15 04:55:06,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 6770.0ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:55:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83645 states. [2021-04-15 04:55:07,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83645 to 48768. [2021-04-15 04:55:07,769 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 04:55:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48768 states to 48768 states and 201683 transitions. [2021-04-15 04:55:07,917 INFO L78 Accepts]: Start accepts. Automaton has 48768 states and 201683 transitions. Word has length 39 [2021-04-15 04:55:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:07,917 INFO L480 AbstractCegarLoop]: Abstraction has 48768 states and 201683 transitions. [2021-04-15 04:55:07,917 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 04:55:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 48768 states and 201683 transitions. [2021-04-15 04:55:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:55:08,004 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:08,004 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 04:55:08,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:08,205 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash -53763145, now seen corresponding path program 87 times [2021-04-15 04:55:08,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:08,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062870225] [2021-04-15 04:55:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:08,480 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:55:09,100 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:55:09,344 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:55:09,727 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 04:55:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062870225] [2021-04-15 04:55:09,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029455916] [2021-04-15 04:55:09,727 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 04:55:09,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:55:09,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:55:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:11,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:11,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 47 [2021-04-15 04:55:11,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:11,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:11,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:11,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:68 [2021-04-15 04:55:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:11,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:11,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2021-04-15 04:55:11,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:11,779 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:55:11,780 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 30 treesize of output 26 [2021-04-15 04:55:11,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:11,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:11,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:11,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-04-15 04:55:11,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:11,915 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-04-15 04:55:11,916 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 04:55:11,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:12,252 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-04-15 04:55:12,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:12,272 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 04:55:12,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:249, output treesize:255 [2021-04-15 04:55:12,776 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-04-15 04:55:13,053 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:55:13,407 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 04:55:13,644 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-04-15 04:55:13,791 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 04:55:13,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:13,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-04-15 04:55:13,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571186471] [2021-04-15 04:55:13,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:55:13,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:13,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:55:13,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:55:13,792 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 04:55:15,637 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-04-15 04:55:16,685 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:55:18,705 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-04-15 04:55:19,609 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-04-15 04:55:20,473 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:55:21,066 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 04:55:21,342 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:55:21,970 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-04-15 04:55:22,374 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:55:22,614 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-04-15 04:55:22,808 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-04-15 04:55:23,860 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-04-15 04:55:24,172 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:55:24,513 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-04-15 04:55:24,904 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:55:25,302 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 04:55:25,534 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:55:25,794 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:55:26,655 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-04-15 04:55:26,973 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:55:28,028 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:55:28,789 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-04-15 04:55:29,008 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-04-15 04:55:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:29,682 INFO L93 Difference]: Finished difference Result 89977 states and 364283 transitions. [2021-04-15 04:55:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:55:29,686 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 04:55:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:29,932 INFO L225 Difference]: With dead ends: 89977 [2021-04-15 04:55:29,932 INFO L226 Difference]: Without dead ends: 89687 [2021-04-15 04:55:29,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 11920.9ms TimeCoverageRelationStatistics Valid=744, Invalid=3948, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 04:55:30,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89687 states. [2021-04-15 04:55:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89687 to 48812. [2021-04-15 04:55:31,132 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 04:55:31,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48812 states to 48812 states and 201863 transitions. [2021-04-15 04:55:31,284 INFO L78 Accepts]: Start accepts. Automaton has 48812 states and 201863 transitions. Word has length 39 [2021-04-15 04:55:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:31,284 INFO L480 AbstractCegarLoop]: Abstraction has 48812 states and 201863 transitions. [2021-04-15 04:55:31,284 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 04:55:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 48812 states and 201863 transitions. [2021-04-15 04:55:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:55:31,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:31,372 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 04:55:31,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:55:31,573 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash 150157601, now seen corresponding path program 88 times [2021-04-15 04:55:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:31,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776975603] [2021-04-15 04:55:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:31,821 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:55:32,416 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:55:32,641 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:55:33,327 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 04:55:33,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776975603] [2021-04-15 04:55:33,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918928551] [2021-04-15 04:55:33,328 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 04:55:33,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:55:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:33,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:55:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:34,305 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 04:55:34,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:34,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:34,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:55:34,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-04-15 04:55:34,472 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:55:34,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 04:55:34,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:34,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:34,485 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 04:55:34,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:55:34,727 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 04:55:34,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:34,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:55:34,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078706624] [2021-04-15 04:55:34,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:55:34,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:55:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:55:34,728 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 04:55:35,729 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-04-15 04:55:36,530 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-04-15 04:55:36,929 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-04-15 04:55:38,523 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-04-15 04:55:38,951 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-04-15 04:55:39,837 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:55:40,910 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 04:55:41,310 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-04-15 04:55:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:55:43,523 INFO L93 Difference]: Finished difference Result 86371 states and 352871 transitions. [2021-04-15 04:55:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:55:43,528 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 04:55:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:55:43,767 INFO L225 Difference]: With dead ends: 86371 [2021-04-15 04:55:43,767 INFO L226 Difference]: Without dead ends: 86265 [2021-04-15 04:55:43,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 5473.7ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 04:55:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86265 states. [2021-04-15 04:55:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86265 to 48938. [2021-04-15 04:55:44,883 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 04:55:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48938 states to 48938 states and 202393 transitions. [2021-04-15 04:55:45,025 INFO L78 Accepts]: Start accepts. Automaton has 48938 states and 202393 transitions. Word has length 39 [2021-04-15 04:55:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:55:45,025 INFO L480 AbstractCegarLoop]: Abstraction has 48938 states and 202393 transitions. [2021-04-15 04:55:45,025 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 04:55:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48938 states and 202393 transitions. [2021-04-15 04:55:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:55:45,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:55:45,110 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 04:55:45,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-04-15 04:55:45,310 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:55:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:55:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1981493855, now seen corresponding path program 89 times [2021-04-15 04:55:45,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:55:45,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327562679] [2021-04-15 04:55:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:55:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:55:45,553 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:55:46,163 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:55:46,401 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:55:46,783 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 04:55:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327562679] [2021-04-15 04:55:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109752303] [2021-04-15 04:55:46,783 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 04:55:46,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:55:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:55:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:55:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:55:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:48,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:48,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:48,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:55:48,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:48,489 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:55:48,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:48,552 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 04:55:48,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:110 [2021-04-15 04:55:50,992 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-04-15 04:55:51,122 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_60], 3=[q1], 6=[v_prenex_61]} [2021-04-15 04:55:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:51,137 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 04:55:51,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:51,573 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 04:55:51,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:51,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:51,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 04:55:51,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-04-15 04:55:51,786 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-04-15 04:55:51,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:51,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:51,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:55:51,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-04-15 04:55:52,260 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-04-15 04:55:52,262 INFO L628 ElimStorePlain]: treesize reduction 47, result has 66.7 percent of original size [2021-04-15 04:55:52,281 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 04:55:52,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:156, output treesize:76 [2021-04-15 04:55:52,541 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-04-15 04:55:52,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:52,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:55:52,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:52,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 04:55:52,890 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-04-15 04:55:52,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:55:52,944 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 04:55:52,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-04-15 04:55:53,235 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 04:55:53,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:55:53,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-04-15 04:55:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881491275] [2021-04-15 04:55:53,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:55:53,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:55:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:55:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=850, Unknown=1, NotChecked=0, Total=992 [2021-04-15 04:55:53,236 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 04:55:53,712 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-04-15 04:55:54,049 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:55:54,411 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:55:54,828 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-04-15 04:55:55,545 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-04-15 04:55:56,017 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-04-15 04:55:56,353 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-04-15 04:55:56,670 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-04-15 04:55:56,897 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-04-15 04:55:57,351 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-04-15 04:55:57,703 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-04-15 04:55:58,202 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-04-15 04:55:58,705 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2021-04-15 04:55:59,559 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-04-15 04:55:59,977 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2021-04-15 04:56:00,283 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 04:56:00,934 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-04-15 04:56:01,453 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-04-15 04:56:01,769 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-04-15 04:56:02,583 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-04-15 04:56:03,086 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-04-15 04:56:03,620 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-04-15 04:56:04,073 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-04-15 04:56:04,978 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-04-15 04:56:05,360 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-04-15 04:56:05,840 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-04-15 04:56:06,759 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-04-15 04:56:06,989 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-04-15 04:56:07,370 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:56:07,699 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-04-15 04:56:07,979 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-04-15 04:56:08,253 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:56:08,638 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-04-15 04:56:08,993 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:56:09,396 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-04-15 04:56:10,019 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:56:10,485 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-04-15 04:56:10,767 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-04-15 04:56:11,039 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:56:11,845 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-04-15 04:56:12,480 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:56:12,681 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:56:13,571 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-04-15 04:56:13,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-04-15 04:56:14,187 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:56:16,972 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:56:17,504 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-04-15 04:56:18,400 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:56:19,126 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-04-15 04:56:19,497 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-04-15 04:56:19,884 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-04-15 04:56:20,194 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-04-15 04:56:20,859 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 04:56:21,604 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-04-15 04:56:21,867 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-04-15 04:56:22,611 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-04-15 04:56:23,349 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-04-15 04:56:23,811 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-04-15 04:56:24,157 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-04-15 04:56:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:25,452 INFO L93 Difference]: Finished difference Result 126466 states and 511867 transitions. [2021-04-15 04:56:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-04-15 04:56:25,456 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 04:56:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:25,859 INFO L225 Difference]: With dead ends: 126466 [2021-04-15 04:56:25,860 INFO L226 Difference]: Without dead ends: 126047 [2021-04-15 04:56:25,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3722 ImplicationChecksByTransitivity, 26918.8ms TimeCoverageRelationStatistics Valid=1614, Invalid=9941, Unknown=1, NotChecked=0, Total=11556 [2021-04-15 04:56:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126047 states. [2021-04-15 04:56:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126047 to 48913. [2021-04-15 04:56:27,432 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 04:56:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48913 states to 48913 states and 202276 transitions. [2021-04-15 04:56:27,848 INFO L78 Accepts]: Start accepts. Automaton has 48913 states and 202276 transitions. Word has length 39 [2021-04-15 04:56:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:27,848 INFO L480 AbstractCegarLoop]: Abstraction has 48913 states and 202276 transitions. [2021-04-15 04:56:27,848 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 04:56:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 48913 states and 202276 transitions. [2021-04-15 04:56:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:56:27,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:27,933 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 04:56:28,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-04-15 04:56:28,133 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash -564113161, now seen corresponding path program 90 times [2021-04-15 04:56:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:28,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146680459] [2021-04-15 04:56:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:28,384 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:56:29,026 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:56:29,508 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 04:56:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146680459] [2021-04-15 04:56:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612336759] [2021-04-15 04:56:29,509 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 04:56:29,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:56:29,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:56:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 04:56:29,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:30,480 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 04:56:30,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:30,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:30,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:56:30,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:56:30,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:56:30,802 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 04:56:30,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:30,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:30,816 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 04:56:30,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:56:31,085 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 04:56:31,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:31,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:56:31,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561295159] [2021-04-15 04:56:31,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:56:31,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:31,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:56:31,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:56:31,086 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 04:56:33,161 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:56:33,711 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:56:34,058 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:56:35,492 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-04-15 04:56:36,102 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:56:36,902 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-04-15 04:56:38,396 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-04-15 04:56:39,111 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-04-15 04:56:39,537 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-04-15 04:56:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:42,252 INFO L93 Difference]: Finished difference Result 105519 states and 430259 transitions. [2021-04-15 04:56:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:56:42,256 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 04:56:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:42,583 INFO L225 Difference]: With dead ends: 105519 [2021-04-15 04:56:42,583 INFO L226 Difference]: Without dead ends: 105351 [2021-04-15 04:56:42,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 6557.6ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 04:56:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105351 states. [2021-04-15 04:56:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105351 to 48999. [2021-04-15 04:56:43,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48999 states, 48998 states have (on average 4.136577003142985) internal successors, (202684), 48998 states have internal predecessors, (202684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48999 states to 48999 states and 202684 transitions. [2021-04-15 04:56:44,386 INFO L78 Accepts]: Start accepts. Automaton has 48999 states and 202684 transitions. Word has length 39 [2021-04-15 04:56:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:44,386 INFO L480 AbstractCegarLoop]: Abstraction has 48999 states and 202684 transitions. [2021-04-15 04:56:44,386 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 04:56:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 48999 states and 202684 transitions. [2021-04-15 04:56:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:56:44,470 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:44,471 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 04:56:44,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:44,671 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:44,671 INFO L82 PathProgramCache]: Analyzing trace with hash -838019273, now seen corresponding path program 91 times [2021-04-15 04:56:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:44,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738236271] [2021-04-15 04:56:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:44,931 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-04-15 04:56:45,615 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-04-15 04:56:46,139 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 04:56:46,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738236271] [2021-04-15 04:56:46,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405118998] [2021-04-15 04:56:46,139 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:56:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 04:56:46,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:56:47,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-04-15 04:56:47,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:47,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:47,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:56:47,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-04-15 04:56:47,492 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:56:47,492 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 04:56:47,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:56:47,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:56:47,508 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 04:56:47,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-04-15 04:56:47,796 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 04:56:47,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:56:47,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-04-15 04:56:47,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74008023] [2021-04-15 04:56:47,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:56:47,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:56:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:56:47,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:56:47,797 INFO L87 Difference]: Start difference. First operand 48999 states and 202684 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 04:56:49,790 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-04-15 04:56:50,303 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-04-15 04:56:50,655 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-04-15 04:56:51,683 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-04-15 04:56:52,343 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-04-15 04:56:52,956 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-04-15 04:56:54,491 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-04-15 04:56:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:56:56,606 INFO L93 Difference]: Finished difference Result 107065 states and 436634 transitions. [2021-04-15 04:56:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:56:56,611 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 04:56:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:56:56,942 INFO L225 Difference]: With dead ends: 107065 [2021-04-15 04:56:56,943 INFO L226 Difference]: Without dead ends: 106983 [2021-04-15 04:56:56,943 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 6099.5ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:56:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106983 states. [2021-04-15 04:56:58,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106983 to 48933. [2021-04-15 04:56:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48933 states, 48932 states have (on average 4.136393362216954) internal successors, (202402), 48932 states have internal predecessors, (202402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:56:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48933 states to 48933 states and 202402 transitions. [2021-04-15 04:56:58,801 INFO L78 Accepts]: Start accepts. Automaton has 48933 states and 202402 transitions. Word has length 39 [2021-04-15 04:56:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:56:58,801 INFO L480 AbstractCegarLoop]: Abstraction has 48933 states and 202402 transitions. [2021-04-15 04:56:58,801 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 04:56:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 48933 states and 202402 transitions. [2021-04-15 04:56:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-04-15 04:56:58,889 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:56:58,889 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 04:56:59,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-04-15 04:56:59,101 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:56:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:56:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash -648841051, now seen corresponding path program 92 times [2021-04-15 04:56:59,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:56:59,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073507000] [2021-04-15 04:56:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:56:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:56:59,223 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 Received shutdown request... [2021-04-15 04:56:59,321 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-04-15 04:56:59,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable411 [2021-04-15 04:56:59,322 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 04:56:59,324 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 04:56:59,325 INFO L202 PluginConnector]: Adding new model buffer-series.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:56:59 BasicIcfg [2021-04-15 04:56:59,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:56:59,325 INFO L168 Benchmark]: Toolchain (without parser) took 795498.41 ms. Allocated memory was 255.9 MB in the beginning and 15.0 GB in the end (delta: 14.7 GB). Free memory was 236.5 MB in the beginning and 9.9 GB in the end (delta: -9.7 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. [2021-04-15 04:56:59,325 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:56:59,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.23 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:56:59,325 INFO L168 Benchmark]: Boogie Preprocessor took 18.12 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 233.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:56:59,325 INFO L168 Benchmark]: RCFGBuilder took 300.71 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 234.2 MB in the end (delta: -359.4 kB). Peak memory consumption was 22.8 MB. Max. memory is 16.0 GB. [2021-04-15 04:56:59,325 INFO L168 Benchmark]: TraceAbstraction took 795154.48 ms. Allocated memory was 255.9 MB in the beginning and 15.0 GB in the end (delta: 14.7 GB). Free memory was 233.7 MB in the beginning and 9.9 GB in the end (delta: -9.7 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. [2021-04-15 04:56:59,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.23 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.12 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 233.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 300.71 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 234.2 MB in the end (delta: -359.4 kB). Peak memory consumption was 22.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 795154.48 ms. Allocated memory was 255.9 MB in the beginning and 15.0 GB in the end (delta: 14.7 GB). Free memory was 233.7 MB in the beginning and 9.9 GB in the end (delta: -9.7 GB). Peak memory consumption was 5.0 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 analyzing trace of length 40 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 35 for 81ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 795047.3ms, OverallIterations: 101, TraceHistogramMax: 2, EmptinessCheckTime: 6583.0ms, AutomataDifference: 521690.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7180 SDtfs, 41313 SDslu, 81051 SDs, 0 SdLazy, 147046 SolverSat, 7830 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 99808.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6857 GetRequests, 2537 SyntacticMatches, 109 SemanticMatches, 4211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69571 ImplicationChecksByTransitivity, 337575.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48999occurred in iteration=99, InterpolantAutomatonStates: 3149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 103404.1ms AutomataMinimizationTime, 100 MinimizatonAttempts, 3259173 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 512.7ms SsaConstructionTime, 1645.1ms SatisfiabilityAnalysisTime, 140091.3ms InterpolantComputationTime, 7147 NumberOfCodeBlocks, 7143 NumberOfCodeBlocksAsserted, 346 NumberOfCheckSat, 6953 ConstructedInterpolants, 309 QuantifiedInterpolants, 164478 SizeOfPredicates, 658 NumberOfNonLiveVariables, 10571 ConjunctsInSsa, 3381 ConjunctsInUnsatCore, 194 InterpolantComputations, 8 PerfectInterpolantSequences, 222/2964 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