/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/min-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:45:21,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:45:21,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:45:21,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 06:45:21,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 06:45:21,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 06:45:21,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 06:45:21,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 06:45:21,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 06:45:21,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 06:45:21,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 06:45:21,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 06:45:21,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:45:21,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:45:21,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:45:21,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:45:21,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:45:21,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:45:21,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:45:21,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:45:21,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:45:21,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:45:21,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:45:21,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:45:21,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 06:45:21,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 06:45:21,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 06:45:21,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 06:45:21,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 06:45:21,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 06:45:21,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 06:45:21,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 06:45:21,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 06:45:21,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 06:45:21,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 06:45:21,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 06:45:21,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 06:45:21,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 06:45:21,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:45:21,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:45:21,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:45:21,525 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 [2021-06-05 06:45:21,560 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:45:21,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:45:21,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:45:21,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:45:21,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:45:21,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:45:21,563 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:45:21,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:45:21,564 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:45:21,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:45:21,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:45:21,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:45:21,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:45:21,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:45:21,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:45:21,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:45:21,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:45:21,571 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:45:21,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:45:21,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:45:21,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:45:21,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:45:21,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:45:21,901 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:45:21,903 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:45:21,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl [2021-06-05 06:45:21,904 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl' [2021-06-05 06:45:21,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:45:21,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:45:21,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:45:21,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:45:21,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:45:21,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:45:21,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:45:21,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:45:21,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:45:21,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,995 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... [2021-06-05 06:45:21,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:45:22,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:45:22,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:45:22,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:45:22,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:45:22,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:45:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:45:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:45:22,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:45:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:45:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:45:22,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:45:22,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:45:22,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:45:22,074 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:45:22,075 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:45:22,075 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:45:22,077 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:45:22,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:45:22,272 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:45:22,273 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:45:22 BoogieIcfgContainer [2021-06-05 06:45:22,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:45:22,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:45:22,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:45:22,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:45:22,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:45:21" (1/2) ... [2021-06-05 06:45:22,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41378fc and model type min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:45:22, skipping insertion in model container [2021-06-05 06:45:22,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:45:22" (2/2) ... [2021-06-05 06:45:22,280 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array.wvr.bpl [2021-06-05 06:45:22,285 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:45:22,285 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:45:22,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:45:22,286 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:45:22,315 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:45:22,369 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:45:22,385 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:45:22,385 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:45:22,385 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:45:22,386 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:45:22,386 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:45:22,386 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:45:22,386 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:45:22,386 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:45:22,394 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 06:45:22,413 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:45:22,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:22,423 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:22,424 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-06-05 06:45:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:22,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974180224] [2021-06-05 06:45:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:22,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:22,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:22,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974180224] [2021-06-05 06:45:22,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974180224] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:45:22,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:45:22,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:45:22,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968859562] [2021-06-05 06:45:22,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:45:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:45:22,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:45:22,616 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:22,665 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 06:45:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:45:22,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:45:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:22,677 INFO L225 Difference]: With dead ends: 217 [2021-06-05 06:45:22,677 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 06:45:22,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:45:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 06:45:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 06:45:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 06:45:22,746 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 06:45:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:22,747 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 06:45:22,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 06:45:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:45:22,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:22,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:22,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:45:22,755 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-05 06:45:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:22,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960303756] [2021-06-05 06:45:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:22,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:22,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:22,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960303756] [2021-06-05 06:45:22,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960303756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:45:22,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:45:22,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:45:22,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232355470] [2021-06-05 06:45:22,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:45:22,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:45:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:45:22,848 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:22,905 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 06:45:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:45:22,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:45:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:22,908 INFO L225 Difference]: With dead ends: 158 [2021-06-05 06:45:22,909 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 06:45:22,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:45:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 06:45:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 06:45:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 06:45:22,929 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 06:45:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:22,929 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 06:45:22,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 06:45:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:45:22,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:22,931 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:22,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:45:22,931 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-06-05 06:45:22,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:22,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625408073] [2021-06-05 06:45:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:22,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:22,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625408073] [2021-06-05 06:45:22,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625408073] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:45:22,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:45:22,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:45:22,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232236660] [2021-06-05 06:45:23,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:45:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:23,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:45:23,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:45:23,002 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:23,069 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 06:45:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:45:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:45:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:23,073 INFO L225 Difference]: With dead ends: 183 [2021-06-05 06:45:23,075 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 06:45:23,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:45:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 06:45:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 06:45:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 06:45:23,102 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 06:45:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:23,102 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 06:45:23,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 06:45:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:45:23,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:23,103 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:23,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:45:23,104 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-05 06:45:23,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:23,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335816549] [2021-06-05 06:45:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335816549] [2021-06-05 06:45:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335816549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606785024] [2021-06-05 06:45:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:23,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:45:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:23,829 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 18 treesize of output 12 [2021-06-05 06:45:23,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:23,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:45:23,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:23,838 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 23 treesize of output 15 [2021-06-05 06:45:23,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:23,843 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 23 treesize of output 15 [2021-06-05 06:45:23,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:23,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 06:45:23,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:23,850 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 16 treesize of output 10 [2021-06-05 06:45:23,852 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:23,876 INFO L628 ElimStorePlain]: treesize reduction 18, result has 58.1 percent of original size [2021-06-05 06:45:23,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:45:23,880 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:178, output treesize:17 [2021-06-05 06:45:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:23,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606785024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:23,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:23,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:23,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347740113] [2021-06-05 06:45:23,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:23,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:23,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:23,909 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:24,125 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-06-05 06:45:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 06:45:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:45:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:24,127 INFO L225 Difference]: With dead ends: 298 [2021-06-05 06:45:24,127 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 06:45:24,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:45:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 06:45:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-06-05 06:45:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 06:45:24,135 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 06:45:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:24,136 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 06:45:24,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 06:45:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:45:24,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:24,137 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:24,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:24,353 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:24,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-05 06:45:24,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:24,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950242330] [2021-06-05 06:45:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:24,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:24,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950242330] [2021-06-05 06:45:24,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950242330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:24,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405538045] [2021-06-05 06:45:24,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:45:24,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:24,957 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:45:24,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 06:45:24,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:24,982 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:45:24,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 06:45:24,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:24,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:24,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 06:45:25,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:25,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:25,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:45:25,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:25,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:25,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:45:25,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:116 [2021-06-05 06:45:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:25,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405538045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:25,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:25,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 06:45:25,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411266637] [2021-06-05 06:45:25,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:45:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:45:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:45:25,297 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:25,800 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 06:45:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:45:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:45:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:25,803 INFO L225 Difference]: With dead ends: 374 [2021-06-05 06:45:25,803 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 06:45:25,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:45:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 06:45:25,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 06:45:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 06:45:25,812 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 06:45:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:25,812 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 06:45:25,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 06:45:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:45:25,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:25,814 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:26,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:45:26,029 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:26,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-05 06:45:26,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:26,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229633600] [2021-06-05 06:45:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:26,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229633600] [2021-06-05 06:45:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229633600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923278106] [2021-06-05 06:45:26,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:26,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:45:26,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:45:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:45:26,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:26,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 06:45:26,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:26,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 06:45:26,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:26,350 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 18 treesize of output 12 [2021-06-05 06:45:26,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:26,353 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 23 treesize of output 15 [2021-06-05 06:45:26,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:26,356 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 23 treesize of output 15 [2021-06-05 06:45:26,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:26,371 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-06-05 06:45:26,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:45:26,372 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-06-05 06:45:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:26,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923278106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:26,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:26,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:45:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825686844] [2021-06-05 06:45:26,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:26,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:26,432 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:26,615 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 06:45:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:45:26,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:45:26,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:26,620 INFO L225 Difference]: With dead ends: 363 [2021-06-05 06:45:26,620 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 06:45:26,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:45:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 06:45:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 06:45:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 06:45:26,631 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 06:45:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:26,633 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 06:45:26,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 06:45:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:45:26,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:26,634 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:26,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:26,853 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-05 06:45:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:26,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666428444] [2021-06-05 06:45:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:26,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:26,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666428444] [2021-06-05 06:45:26,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666428444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:26,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509231052] [2021-06-05 06:45:26,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:27,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:27,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:45:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:27,226 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:45:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 06:45:27,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:27,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:27,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 06:45:27,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:27,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:27,302 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:45:27,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-06-05 06:45:27,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:27,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:27,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:45:27,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:27,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:27,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:45:27,365 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-06-05 06:45:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:27,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509231052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:27,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:27,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:27,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145060517] [2021-06-05 06:45:27,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:27,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:27,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:27,470 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:27,765 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 06:45:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 06:45:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:45:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:27,768 INFO L225 Difference]: With dead ends: 425 [2021-06-05 06:45:27,768 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 06:45:27,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:45:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 06:45:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 06:45:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 06:45:27,776 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 06:45:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:27,776 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 06:45:27,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 06:45:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:27,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:27,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:27,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:27,997 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-05 06:45:27,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:27,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881713670] [2021-06-05 06:45:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:28,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:28,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881713670] [2021-06-05 06:45:28,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881713670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:28,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281061434] [2021-06-05 06:45:28,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:28,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:45:28,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:28,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:28,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:28,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281061434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:28,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:28,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:28,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207411912] [2021-06-05 06:45:28,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:28,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:28,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:28,178 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:28,554 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 06:45:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:45:28,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:28,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:28,558 INFO L225 Difference]: With dead ends: 619 [2021-06-05 06:45:28,558 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 06:45:28,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:45:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 06:45:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 06:45:28,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 06:45:28,568 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 06:45:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:28,568 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 06:45:28,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 06:45:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:28,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:28,569 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:28,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 06:45:28,792 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-05 06:45:28,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:28,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692319893] [2021-06-05 06:45:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:28,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692319893] [2021-06-05 06:45:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692319893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294566181] [2021-06-05 06:45:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:28,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:45:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294566181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:28,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:28,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:28,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495233499] [2021-06-05 06:45:28,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:28,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:28,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:28,979 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:29,709 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 06:45:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:45:29,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:29,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:29,718 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 06:45:29,718 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 06:45:29,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:45:29,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 06:45:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 06:45:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:29,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 06:45:29,732 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 06:45:29,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:29,732 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 06:45:29,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 06:45:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:29,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:29,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:29,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:29,957 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:29,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-05 06:45:29,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:29,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904922166] [2021-06-05 06:45:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:30,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:30,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904922166] [2021-06-05 06:45:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904922166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:30,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227367523] [2021-06-05 06:45:30,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:30,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227367523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:30,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:30,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:30,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593480583] [2021-06-05 06:45:30,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:30,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:30,132 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:30,757 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 06:45:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:45:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:30,762 INFO L225 Difference]: With dead ends: 951 [2021-06-05 06:45:30,762 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 06:45:30,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:45:30,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 06:45:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 06:45:30,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 06:45:30,775 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 06:45:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:30,775 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 06:45:30,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 06:45:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:30,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:30,777 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:30,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:30,989 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-05 06:45:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776678830] [2021-06-05 06:45:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:31,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776678830] [2021-06-05 06:45:31,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776678830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:31,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052024529] [2021-06-05 06:45:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:45:31,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:31,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052024529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:31,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:31,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:45:31,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893427523] [2021-06-05 06:45:31,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:45:31,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:45:31,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:45:31,120 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:31,218 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 06:45:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:45:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:31,222 INFO L225 Difference]: With dead ends: 669 [2021-06-05 06:45:31,222 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 06:45:31,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 06:45:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 06:45:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 06:45:31,234 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 06:45:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:31,234 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 06:45:31,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 06:45:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:31,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:31,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:31,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 06:45:31,449 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-05 06:45:31,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:31,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702570057] [2021-06-05 06:45:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:31,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:31,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:31,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702570057] [2021-06-05 06:45:31,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702570057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:31,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759215367] [2021-06-05 06:45:31,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:31,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:31,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:31,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759215367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:31,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:31,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:45:31,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796027688] [2021-06-05 06:45:31,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:31,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:31,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:31,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:31,616 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:31,791 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 06:45:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:45:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:31,795 INFO L225 Difference]: With dead ends: 710 [2021-06-05 06:45:31,795 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 06:45:31,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:45:31,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 06:45:31,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 06:45:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 06:45:31,815 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 06:45:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:31,815 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 06:45:31,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 06:45:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:31,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:31,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:32,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:32,040 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:32,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-05 06:45:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:32,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399923083] [2021-06-05 06:45:32,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:32,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:32,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399923083] [2021-06-05 06:45:32,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399923083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:32,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948719242] [2021-06-05 06:45:32,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:32,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:45:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948719242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:32,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:32,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:45:32,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193275749] [2021-06-05 06:45:32,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:45:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:45:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:45:32,161 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:32,256 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 06:45:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:45:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:32,263 INFO L225 Difference]: With dead ends: 830 [2021-06-05 06:45:32,263 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 06:45:32,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 06:45:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 06:45:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:32,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 06:45:32,280 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 06:45:32,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:32,280 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 06:45:32,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:32,280 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 06:45:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:32,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:32,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:32,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:32,497 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-05 06:45:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:32,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891125241] [2021-06-05 06:45:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:32,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:32,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891125241] [2021-06-05 06:45:32,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891125241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:32,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895256128] [2021-06-05 06:45:32,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:32,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:45:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:32,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895256128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:32,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:32,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:32,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258793188] [2021-06-05 06:45:32,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:32,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:32,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:32,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:32,655 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:32,937 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 06:45:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:45:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:32,943 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 06:45:32,943 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 06:45:32,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:45:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 06:45:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 06:45:32,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:32,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 06:45:32,964 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 06:45:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:32,965 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 06:45:32,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 06:45:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:32,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:32,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:33,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 06:45:33,189 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-05 06:45:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:33,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985066474] [2021-06-05 06:45:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:33,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:33,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985066474] [2021-06-05 06:45:33,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985066474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:33,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205631114] [2021-06-05 06:45:33,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:33,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:33,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:33,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205631114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:33,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:33,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:33,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348349152] [2021-06-05 06:45:33,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:33,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:33,331 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:33,755 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 06:45:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:45:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:33,762 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 06:45:33,762 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 06:45:33,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:45:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 06:45:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 06:45:33,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 06:45:33,786 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 06:45:33,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:33,786 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 06:45:33,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 06:45:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:33,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:33,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:34,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 06:45:34,006 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-05 06:45:34,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:34,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386099780] [2021-06-05 06:45:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386099780] [2021-06-05 06:45:34,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386099780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768493404] [2021-06-05 06:45:34,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:34,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:34,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:34,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768493404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:34,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:34,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:45:34,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488295519] [2021-06-05 06:45:34,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:34,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:34,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:34,174 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:34,410 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 06:45:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:45:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:34,416 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 06:45:34,416 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 06:45:34,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:45:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 06:45:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 06:45:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 06:45:34,440 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 06:45:34,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:34,440 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 06:45:34,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:34,440 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 06:45:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:34,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:34,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:34,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 06:45:34,665 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-05 06:45:34,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:34,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196048990] [2021-06-05 06:45:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:34,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:34,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196048990] [2021-06-05 06:45:34,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196048990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:34,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232685583] [2021-06-05 06:45:34,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:34,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:45:34,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:34,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232685583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:34,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:34,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:45:34,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583746363] [2021-06-05 06:45:34,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:34,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:34,824 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:35,089 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 06:45:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:45:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:35,095 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 06:45:35,095 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 06:45:35,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:45:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 06:45:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 06:45:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:35,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 06:45:35,121 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 06:45:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:35,122 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 06:45:35,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 06:45:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:35,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:35,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:35,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:35,341 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-05 06:45:35,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:35,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140629509] [2021-06-05 06:45:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:35,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:35,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140629509] [2021-06-05 06:45:35,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140629509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:35,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838396415] [2021-06-05 06:45:35,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:35,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:35,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838396415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:35,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:35,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:35,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193663799] [2021-06-05 06:45:35,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:35,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:35,475 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:35,807 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 06:45:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:45:35,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:35,814 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 06:45:35,814 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 06:45:35,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 206.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:45:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 06:45:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 06:45:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 06:45:35,840 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 06:45:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:35,841 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 06:45:35,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 06:45:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:35,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:35,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:36,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:36,065 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-05 06:45:36,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:36,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634940237] [2021-06-05 06:45:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:36,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:36,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634940237] [2021-06-05 06:45:36,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634940237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:36,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322603192] [2021-06-05 06:45:36,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:36,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:36,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:36,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:36,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322603192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:36,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:36,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:36,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882519594] [2021-06-05 06:45:36,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:36,224 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:36,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:36,912 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 06:45:36,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:45:36,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:36,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:36,924 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 06:45:36,924 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 06:45:36,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:45:36,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 06:45:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 06:45:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 06:45:36,960 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 06:45:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:36,960 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 06:45:36,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 06:45:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:36,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:36,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:37,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:37,177 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-05 06:45:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:37,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908524976] [2021-06-05 06:45:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:37,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:37,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:37,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908524976] [2021-06-05 06:45:37,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908524976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:37,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292370531] [2021-06-05 06:45:37,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:37,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:45:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292370531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:37,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:37,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190811416] [2021-06-05 06:45:37,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:37,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:37,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:37,347 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:38,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:38,017 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 06:45:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:45:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:38,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:38,025 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 06:45:38,025 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 06:45:38,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:45:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 06:45:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 06:45:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 06:45:38,060 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 06:45:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:38,060 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 06:45:38,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 06:45:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:38,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:38,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:38,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:45:38,285 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-05 06:45:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:38,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878536810] [2021-06-05 06:45:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:38,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878536810] [2021-06-05 06:45:38,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878536810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:38,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606435252] [2021-06-05 06:45:38,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:38,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:38,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:38,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606435252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:38,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:38,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:38,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75040737] [2021-06-05 06:45:38,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:38,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:38,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:38,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:38,433 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:38,965 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 06:45:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:45:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:38,972 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 06:45:38,972 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 06:45:38,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:45:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 06:45:39,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 06:45:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 06:45:39,009 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 06:45:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:39,009 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 06:45:39,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:39,009 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 06:45:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:39,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:39,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:39,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 06:45:39,225 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-05 06:45:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:39,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712817236] [2021-06-05 06:45:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:39,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:39,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712817236] [2021-06-05 06:45:39,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712817236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:39,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212831696] [2021-06-05 06:45:39,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:39,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:45:39,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:39,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212831696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:39,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:39,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622768049] [2021-06-05 06:45:39,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:39,368 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:39,949 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 06:45:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:45:39,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:39,954 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 06:45:39,954 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 06:45:39,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:45:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 06:45:39,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 06:45:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 06:45:39,988 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 06:45:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:39,988 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 06:45:39,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 06:45:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:39,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:39,990 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:40,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 06:45:40,212 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-05 06:45:40,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:40,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564933538] [2021-06-05 06:45:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:40,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:40,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:40,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564933538] [2021-06-05 06:45:40,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564933538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:40,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169587354] [2021-06-05 06:45:40,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:40,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:45:40,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169587354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:40,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:40,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:40,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62910192] [2021-06-05 06:45:40,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:40,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:40,361 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:40,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:40,928 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 06:45:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:45:40,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:40,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:40,934 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 06:45:40,934 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 06:45:40,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:45:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 06:45:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 06:45:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 06:45:40,986 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 06:45:40,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:40,986 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 06:45:40,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:40,986 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 06:45:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:40,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:40,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:41,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 06:45:41,209 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-05 06:45:41,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:41,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891790427] [2021-06-05 06:45:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:41,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891790427] [2021-06-05 06:45:41,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891790427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458094270] [2021-06-05 06:45:41,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:41,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458094270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:41,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:41,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:41,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357074148] [2021-06-05 06:45:41,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:41,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:41,357 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:41,908 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 06:45:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:45:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:41,914 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 06:45:41,914 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 06:45:41,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:45:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 06:45:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 06:45:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:41,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 06:45:41,944 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 06:45:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:41,944 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 06:45:41,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 06:45:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:41,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:41,947 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:42,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:45:42,161 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:42,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-05 06:45:42,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:42,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105598199] [2021-06-05 06:45:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:42,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:42,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105598199] [2021-06-05 06:45:42,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105598199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:42,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692640301] [2021-06-05 06:45:42,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:42,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:45:42,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:42,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:45:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:42,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692640301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:42,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:42,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:45:42,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020584444] [2021-06-05 06:45:42,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:45:42,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:42,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:45:42,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:45:42,256 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:42,333 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 06:45:42,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:45:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:42,336 INFO L225 Difference]: With dead ends: 929 [2021-06-05 06:45:42,336 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 06:45:42,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 06:45:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 06:45:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 06:45:42,365 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 06:45:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:42,365 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 06:45:42,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 06:45:42,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:42,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:42,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:42,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:42,590 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:42,591 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-05 06:45:42,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:42,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510690806] [2021-06-05 06:45:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:42,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510690806] [2021-06-05 06:45:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510690806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:42,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675514295] [2021-06-05 06:45:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:42,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:42,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:42,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:42,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675514295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:42,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:42,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:45:42,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735163688] [2021-06-05 06:45:42,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:45:42,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:42,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:45:42,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:45:42,721 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:42,993 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 06:45:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:45:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:42,997 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 06:45:42,997 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 06:45:42,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:45:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 06:45:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 06:45:43,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 06:45:43,021 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 06:45:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:43,021 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 06:45:43,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 06:45:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:43,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:43,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:43,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:43,242 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:43,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-05 06:45:43,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:43,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566150650] [2021-06-05 06:45:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:43,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566150650] [2021-06-05 06:45:43,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566150650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:43,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129554625] [2021-06-05 06:45:43,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:43,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:45:43,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:43,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:43,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:43,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129554625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:43,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:43,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:45:43,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250741627] [2021-06-05 06:45:43,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:45:43,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:43,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:45:43,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:45:43,369 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:43,613 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 06:45:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:45:43,614 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:43,617 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 06:45:43,617 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 06:45:43,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:45:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 06:45:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 06:45:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 06:45:43,638 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 06:45:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:43,638 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 06:45:43,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 06:45:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:43,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:43,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:43,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:43,861 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:43,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-05 06:45:43,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:43,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104643628] [2021-06-05 06:45:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:43,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104643628] [2021-06-05 06:45:43,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104643628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347332778] [2021-06-05 06:45:43,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:43,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:43,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:45:43,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347332778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:43,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:43,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 06:45:43,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217930749] [2021-06-05 06:45:43,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:45:43,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:43,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:45:43,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:45:43,959 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:44,153 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 06:45:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:45:44,154 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:44,156 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:45:44,156 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 06:45:44,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:45:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 06:45:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 06:45:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:44,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 06:45:44,174 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 06:45:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:44,175 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 06:45:44,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:44,175 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 06:45:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:44,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:44,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:44,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 06:45:44,396 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-05 06:45:44,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:44,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149977270] [2021-06-05 06:45:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:44,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:44,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149977270] [2021-06-05 06:45:44,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149977270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:44,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293360717] [2021-06-05 06:45:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:44,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:45:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:44,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:44,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293360717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:44,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:44,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:45:44,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496817846] [2021-06-05 06:45:44,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:45:44,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:45:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:45:44,493 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:44,695 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 06:45:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:45:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:44,697 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 06:45:44,697 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 06:45:44,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:45:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 06:45:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 06:45:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 06:45:44,715 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 06:45:44,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:44,716 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 06:45:44,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 06:45:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:44,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:44,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:44,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:44,937 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-05 06:45:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:44,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954273411] [2021-06-05 06:45:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:44,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:44,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954273411] [2021-06-05 06:45:44,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954273411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:44,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371269536] [2021-06-05 06:45:44,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:45,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:45:45,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:45,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:45,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371269536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:45,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:45,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544360371] [2021-06-05 06:45:45,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:45,093 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:45,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:45,531 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 06:45:45,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:45:45,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:45,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:45,534 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 06:45:45,534 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 06:45:45,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:45:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 06:45:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 06:45:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 06:45:45,556 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 06:45:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:45,556 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 06:45:45,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:45,556 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 06:45:45,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:45,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:45,558 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:45,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 06:45:45,781 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-05 06:45:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:45,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089477044] [2021-06-05 06:45:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:45,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:45,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089477044] [2021-06-05 06:45:45,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089477044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:45,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623066016] [2021-06-05 06:45:45,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:45,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623066016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:45,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:45,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:45,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568861637] [2021-06-05 06:45:45,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:45,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:45,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:45,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:45,933 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:46,353 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 06:45:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:45:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:46,356 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 06:45:46,356 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 06:45:46,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:45:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 06:45:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 06:45:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:45:46,376 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:45:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:46,376 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:45:46,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:45:46,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:46,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:46,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:46,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:46,601 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-05 06:45:46,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:46,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583414883] [2021-06-05 06:45:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:46,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:46,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583414883] [2021-06-05 06:45:46,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583414883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:46,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981759325] [2021-06-05 06:45:46,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:46,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:46,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:46,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981759325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:46,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:46,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:46,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782601934] [2021-06-05 06:45:46,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:46,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:46,745 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:47,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:47,097 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 06:45:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:45:47,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:47,101 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 06:45:47,101 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 06:45:47,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:45:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 06:45:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 06:45:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:45:47,119 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:45:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:47,119 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:45:47,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:45:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:47,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:47,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:47,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 06:45:47,322 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-05 06:45:47,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:47,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228963713] [2021-06-05 06:45:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:47,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:47,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:47,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228963713] [2021-06-05 06:45:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228963713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:47,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016664890] [2021-06-05 06:45:47,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:47,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:45:47,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:47,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016664890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627587874] [2021-06-05 06:45:47,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:47,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:47,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:47,450 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:47,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:47,765 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 06:45:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:45:47,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:47,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:47,768 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 06:45:47,768 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 06:45:47,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:45:47,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 06:45:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 06:45:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:45:47,788 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:45:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:47,788 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:45:47,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:45:47,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:47,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:47,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:48,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:48,011 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-05 06:45:48,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:48,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902778925] [2021-06-05 06:45:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:48,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:48,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902778925] [2021-06-05 06:45:48,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902778925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:48,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613028437] [2021-06-05 06:45:48,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:48,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:48,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:48,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:48,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:48,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613028437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:48,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:48,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:48,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954890111] [2021-06-05 06:45:48,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:48,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:48,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:48,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:48,151 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:48,475 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 06:45:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:45:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:48,478 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 06:45:48,478 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 06:45:48,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:45:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 06:45:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 06:45:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 06:45:48,499 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 06:45:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:48,499 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 06:45:48,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 06:45:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:48,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:48,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:48,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 06:45:48,701 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:48,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:48,701 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-05 06:45:48,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:48,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949058456] [2021-06-05 06:45:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:48,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:48,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949058456] [2021-06-05 06:45:48,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949058456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:48,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413562335] [2021-06-05 06:45:48,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:48,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:45:48,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:48,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:48,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413562335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:48,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:48,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:48,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830288670] [2021-06-05 06:45:48,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:48,829 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:49,153 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 06:45:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:45:49,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:49,156 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 06:45:49,156 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 06:45:49,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:45:49,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 06:45:49,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 06:45:49,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 06:45:49,178 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 06:45:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:49,178 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 06:45:49,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 06:45:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:49,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:49,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:49,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 06:45:49,393 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:49,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-05 06:45:49,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:49,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354430494] [2021-06-05 06:45:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:49,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354430494] [2021-06-05 06:45:49,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354430494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:49,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083152018] [2021-06-05 06:45:49,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:49,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:45:49,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:49,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083152018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:49,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:49,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:49,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944650377] [2021-06-05 06:45:49,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:49,506 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:49,812 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 06:45:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:45:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:49,815 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 06:45:49,815 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 06:45:49,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:45:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 06:45:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 06:45:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 06:45:49,833 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 06:45:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:49,833 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 06:45:49,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 06:45:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:49,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:49,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:50,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:50,041 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-05 06:45:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:50,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746488368] [2021-06-05 06:45:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:50,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:50,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746488368] [2021-06-05 06:45:50,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746488368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:50,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523906546] [2021-06-05 06:45:50,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:50,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:50,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523906546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:50,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:50,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:50,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613377674] [2021-06-05 06:45:50,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:50,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:50,158 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:50,400 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 06:45:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:45:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:50,403 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 06:45:50,403 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 06:45:50,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:45:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 06:45:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 06:45:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 06:45:50,427 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 06:45:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:50,427 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 06:45:50,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 06:45:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:50,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:50,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:50,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:50,651 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-05 06:45:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:50,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105323940] [2021-06-05 06:45:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:50,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:50,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105323940] [2021-06-05 06:45:50,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105323940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:50,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062711091] [2021-06-05 06:45:50,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:50,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:45:50,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:50,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:50,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:50,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062711091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:50,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:50,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:45:50,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697850955] [2021-06-05 06:45:50,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:45:50,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:45:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:45:50,761 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:50,969 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 06:45:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:45:50,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:50,975 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 06:45:50,975 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 06:45:50,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:45:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 06:45:50,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 06:45:50,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 06:45:50,996 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 06:45:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:50,996 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 06:45:50,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 06:45:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:50,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:50,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:51,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:51,213 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-05 06:45:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:51,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940190532] [2021-06-05 06:45:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:51,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940190532] [2021-06-05 06:45:51,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940190532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:51,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171060885] [2021-06-05 06:45:51,250 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:51,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:45:51,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:51,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:51,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:51,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171060885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:51,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:51,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:51,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668339846] [2021-06-05 06:45:51,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:51,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:51,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:51,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:51,338 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:51,636 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 06:45:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:45:51,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:51,638 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 06:45:51,638 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 06:45:51,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:45:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 06:45:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 06:45:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 06:45:51,655 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 06:45:51,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:51,655 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 06:45:51,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 06:45:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:51,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:51,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:51,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:51,860 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-05 06:45:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:51,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729125654] [2021-06-05 06:45:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:51,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729125654] [2021-06-05 06:45:51,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729125654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963167939] [2021-06-05 06:45:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:51,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:51,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:51,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:51,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:51,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963167939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:51,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:51,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:45:51,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339868962] [2021-06-05 06:45:51,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:45:51,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:45:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:45:51,989 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:52,230 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 06:45:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:45:52,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:52,232 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 06:45:52,232 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 06:45:52,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:45:52,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 06:45:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 06:45:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 06:45:52,250 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 06:45:52,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:52,250 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 06:45:52,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 06:45:52,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:45:52,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:52,252 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:52,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 06:45:52,474 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:52,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:52,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-05 06:45:52,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:52,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020605849] [2021-06-05 06:45:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:52,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:52,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020605849] [2021-06-05 06:45:52,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020605849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:52,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879473982] [2021-06-05 06:45:52,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:52,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:45:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:45:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:52,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879473982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:52,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:52,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:45:52,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699419728] [2021-06-05 06:45:52,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:45:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:45:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:45:52,598 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:52,768 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 06:45:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:45:52,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:45:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:52,771 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 06:45:52,771 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 06:45:52,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:45:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 06:45:52,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 06:45:52,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 06:45:52,792 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 06:45:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:52,792 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 06:45:52,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 06:45:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:45:52,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:52,794 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:53,016 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-05 06:45:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:53,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960742642] [2021-06-05 06:45:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:53,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:53,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960742642] [2021-06-05 06:45:53,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960742642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:53,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239096762] [2021-06-05 06:45:53,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:53,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:45:53,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:45:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:45:53,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:45:53,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:53,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:45:53,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:45:53,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:45:53,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:53,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:45:53,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:53,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:45:54,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 06:45:54,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:45:54,017 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:45:54,023 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:45:54,030 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:45:54,037 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:45:54,044 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:45:54,051 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:54,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:54,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:45:54,055 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:54,075 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:45:54,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:45:54,076 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 06:45:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:54,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239096762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:54,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:54,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:45:54,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416956694] [2021-06-05 06:45:54,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:45:54,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:45:54,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:45:54,102 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:54,825 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 06:45:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:45:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:45:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:54,827 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 06:45:54,827 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 06:45:54,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 967.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:45:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 06:45:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 06:45:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 06:45:54,847 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 06:45:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:54,847 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 06:45:54,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 06:45:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:45:54,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:54,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:55,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 06:45:55,071 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-05 06:45:55,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:55,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269161916] [2021-06-05 06:45:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:55,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:55,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269161916] [2021-06-05 06:45:55,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269161916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:55,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17117800] [2021-06-05 06:45:55,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:55,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:45:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:45:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:55,952 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-06-05 06:45:56,027 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_3], 2=[A, v_prenex_5]} [2021-06-05 06:45:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:56,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:45:56,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:56,120 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 06:45:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:56,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:56,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:45:56,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:56,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:45:56,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:56,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:45:56,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:56,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:45:56,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:56,232 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 06:45:56,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:45:56,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-05 06:45:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:56,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17117800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:56,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:56,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:45:56,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647562162] [2021-06-05 06:45:56,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:45:56,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:56,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:45:56,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:45:56,298 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:45:57,640 INFO L93 Difference]: Finished difference Result 1616 states and 5213 transitions. [2021-06-05 06:45:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:45:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:45:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:45:57,643 INFO L225 Difference]: With dead ends: 1616 [2021-06-05 06:45:57,643 INFO L226 Difference]: Without dead ends: 1571 [2021-06-05 06:45:57,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1593.9ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:45:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-05 06:45:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1171. [2021-06-05 06:45:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.347008547008547) internal successors, (3916), 1170 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3916 transitions. [2021-06-05 06:45:57,665 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3916 transitions. Word has length 26 [2021-06-05 06:45:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:45:57,665 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3916 transitions. [2021-06-05 06:45:57,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3916 transitions. [2021-06-05 06:45:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:45:57,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:45:57,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:45:57,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:57,868 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:45:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:45:57,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-05 06:45:57,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:45:57,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900551970] [2021-06-05 06:45:57,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:45:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:45:58,230 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-06-05 06:45:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:58,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:45:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900551970] [2021-06-05 06:45:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900551970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:58,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057872995] [2021-06-05 06:45:58,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:45:58,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:45:58,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:45:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:45:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:45:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:45:59,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:45:59,024 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:45:59,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:45:59,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:45:59,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:45:59,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:45:59,072 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:45:59,081 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:45:59,090 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:45:59,097 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:45:59,106 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:45:59,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:45:59,127 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:45:59,136 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:45:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:45:59,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:45:59,142 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:45:59,165 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:45:59,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:45:59,167 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:45:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:45:59,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057872995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:45:59,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:45:59,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:45:59,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878433895] [2021-06-05 06:45:59,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:45:59,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:45:59,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:45:59,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:45:59,199 INFO L87 Difference]: Start difference. First operand 1171 states and 3916 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:45:59,993 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2021-06-05 06:46:00,578 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-05 06:46:00,709 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-06-05 06:46:01,244 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-06-05 06:46:01,772 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 06:46:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:01,841 INFO L93 Difference]: Finished difference Result 1671 states and 5380 transitions. [2021-06-05 06:46:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:46:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:01,844 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 06:46:01,844 INFO L226 Difference]: Without dead ends: 1656 [2021-06-05 06:46:01,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2698.3ms TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:46:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-05 06:46:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1201. [2021-06-05 06:46:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3316666666666666) internal successors, (3998), 1200 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:01,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3998 transitions. [2021-06-05 06:46:01,859 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3998 transitions. Word has length 26 [2021-06-05 06:46:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:01,859 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 3998 transitions. [2021-06-05 06:46:01,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3998 transitions. [2021-06-05 06:46:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:01,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:01,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:02,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:02,065 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:02,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-05 06:46:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:02,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418034219] [2021-06-05 06:46:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:02,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418034219] [2021-06-05 06:46:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418034219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827495041] [2021-06-05 06:46:02,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:02,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:46:02,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:46:02,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:02,881 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-05 06:46:02,948 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_9], 2=[A, v_prenex_7]} [2021-06-05 06:46:02,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:02,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:02,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:03,074 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 06:46:03,075 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 06:46:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:03,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:03,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:46:03,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:03,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:03,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:03,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:03,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:46:03,110 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:03,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:03,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:03,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-05 06:46:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827495041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:03,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:03,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:46:03,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334343900] [2021-06-05 06:46:03,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:46:03,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:46:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:46:03,167 INFO L87 Difference]: Start difference. First operand 1201 states and 3998 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:04,048 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-06-05 06:46:04,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:04,304 INFO L93 Difference]: Finished difference Result 1703 states and 5445 transitions. [2021-06-05 06:46:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:46:04,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:04,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:04,307 INFO L225 Difference]: With dead ends: 1703 [2021-06-05 06:46:04,307 INFO L226 Difference]: Without dead ends: 1673 [2021-06-05 06:46:04,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1430.2ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:46:04,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-06-05 06:46:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1210. [2021-06-05 06:46:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1209 states have (on average 3.329197684036394) internal successors, (4025), 1209 states have internal predecessors, (4025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 4025 transitions. [2021-06-05 06:46:04,323 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 4025 transitions. Word has length 26 [2021-06-05 06:46:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:04,323 INFO L482 AbstractCegarLoop]: Abstraction has 1210 states and 4025 transitions. [2021-06-05 06:46:04,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 4025 transitions. [2021-06-05 06:46:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:04,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:04,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:04,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 06:46:04,525 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:04,526 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-05 06:46:04,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:04,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703005054] [2021-06-05 06:46:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:04,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:04,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703005054] [2021-06-05 06:46:04,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703005054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:04,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820740422] [2021-06-05 06:46:04,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:04,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:46:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:05,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:05,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:46:05,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:46:05,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:46:05,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:05,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:46:05,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:46:05,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:46:05,671 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:46:05,679 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:46:05,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:46:05,693 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:46:05,702 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:05,710 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:05,717 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:05,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:05,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:46:05,721 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:05,737 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 06:46:05,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:05,738 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:46:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:05,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820740422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:05,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:05,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:46:05,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7666220] [2021-06-05 06:46:05,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:46:05,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:46:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:46:05,760 INFO L87 Difference]: Start difference. First operand 1210 states and 4025 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:07,661 INFO L93 Difference]: Finished difference Result 1830 states and 5830 transitions. [2021-06-05 06:46:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:46:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:07,664 INFO L225 Difference]: With dead ends: 1830 [2021-06-05 06:46:07,664 INFO L226 Difference]: Without dead ends: 1815 [2021-06-05 06:46:07,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1895.5ms TimeCoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:46:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-06-05 06:46:07,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1222. [2021-06-05 06:46:07,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.3374283374283373) internal successors, (4075), 1221 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4075 transitions. [2021-06-05 06:46:07,680 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4075 transitions. Word has length 26 [2021-06-05 06:46:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:07,680 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4075 transitions. [2021-06-05 06:46:07,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4075 transitions. [2021-06-05 06:46:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:07,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:07,682 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:07,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 06:46:07,888 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:07,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-05 06:46:07,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:07,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286756787] [2021-06-05 06:46:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:08,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:08,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286756787] [2021-06-05 06:46:08,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286756787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:08,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167169297] [2021-06-05 06:46:08,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:08,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:46:08,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:46:08,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:09,042 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-06-05 06:46:09,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:46:09,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,095 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:46:09,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 06:46:09,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,139 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-05 06:46:09,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 30 [2021-06-05 06:46:09,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,186 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:46:09,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 06:46:09,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,234 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:46:09,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 06:46:09,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,266 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:46:09,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:46:09,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,312 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:46:09,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 06:46:09,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,365 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:46:09,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 06:46:09,382 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,422 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:46:09,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 06:46:09,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,489 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 06:46:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 38 [2021-06-05 06:46:09,492 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,515 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:46:09,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:46:09,516 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,540 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:46:09,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:46:09,541 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,595 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:46:09,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 06:46:09,607 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,658 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:46:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 06:46:09,668 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,711 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:46:09,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 06:46:09,718 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:09,737 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:46:09,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:46:09,738 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:10,179 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2021-06-05 06:46:10,179 INFO L628 ElimStorePlain]: treesize reduction 219, result has 60.0 percent of original size [2021-06-05 06:46:10,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-05 06:46:10,191 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:833, output treesize:385 [2021-06-05 06:46:10,423 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-05 06:46:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:10,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167169297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:10,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:10,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:46:10,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395117515] [2021-06-05 06:46:10,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:46:10,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:10,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:46:10,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:46:10,559 INFO L87 Difference]: Start difference. First operand 1222 states and 4075 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:12,195 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 06:46:12,560 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2021-06-05 06:46:12,901 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 06:46:13,235 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 06:46:13,492 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 66 [2021-06-05 06:46:13,898 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-05 06:46:14,102 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 56 [2021-06-05 06:46:14,258 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2021-06-05 06:46:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:14,743 INFO L93 Difference]: Finished difference Result 2502 states and 7680 transitions. [2021-06-05 06:46:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:46:14,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:14,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:14,746 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 06:46:14,746 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 06:46:14,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 4354.1ms TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:46:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 06:46:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 1394. [2021-06-05 06:46:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.3058147882268485) internal successors, (4605), 1393 states have internal predecessors, (4605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:14,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 4605 transitions. [2021-06-05 06:46:14,766 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 4605 transitions. Word has length 26 [2021-06-05 06:46:14,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:14,766 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 4605 transitions. [2021-06-05 06:46:14,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 4605 transitions. [2021-06-05 06:46:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:14,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:14,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:14,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 06:46:14,969 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-05 06:46:14,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:14,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863104473] [2021-06-05 06:46:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:15,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863104473] [2021-06-05 06:46:15,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863104473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:15,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695596524] [2021-06-05 06:46:15,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:46:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:15,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:46:15,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:15,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 06:46:15,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:15,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:15,808 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:15,814 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:15,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:46:15,827 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:15,833 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:15,839 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:15,845 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:15,850 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:15,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:15,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:15,859 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:15,878 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:46:15,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:15,880 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 06:46:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:15,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695596524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:15,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:15,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:46:15,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852169858] [2021-06-05 06:46:15,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:46:15,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:15,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:46:15,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:46:15,904 INFO L87 Difference]: Start difference. First operand 1394 states and 4605 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:16,695 INFO L93 Difference]: Finished difference Result 1799 states and 5825 transitions. [2021-06-05 06:46:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:46:16,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:16,699 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 06:46:16,699 INFO L226 Difference]: Without dead ends: 1784 [2021-06-05 06:46:16,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:46:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-05 06:46:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1405. [2021-06-05 06:46:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 3.3034188034188032) internal successors, (4638), 1404 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4638 transitions. [2021-06-05 06:46:16,718 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4638 transitions. Word has length 26 [2021-06-05 06:46:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:16,718 INFO L482 AbstractCegarLoop]: Abstraction has 1405 states and 4638 transitions. [2021-06-05 06:46:16,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:16,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4638 transitions. [2021-06-05 06:46:16,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:16,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:16,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:16,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:16,921 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-05 06:46:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:16,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723538594] [2021-06-05 06:46:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:17,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:17,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723538594] [2021-06-05 06:46:17,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723538594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:17,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928334672] [2021-06-05 06:46:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:17,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:46:17,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:46:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:17,603 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 06:46:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:17,819 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 06:46:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select 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 39 [2021-06-05 06:46:17,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:17,839 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 06:46:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:46:17,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:18,238 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2021-06-05 06:46:18,238 INFO L628 ElimStorePlain]: treesize reduction 100, result has 83.4 percent of original size [2021-06-05 06:46:18,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:18,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:18,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 36 [2021-06-05 06:46:18,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:18,291 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 06:46:18,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:46:18,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:18,436 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-05 06:46:18,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:18,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:18,460 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 06:46:18,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 06:46:18,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:18,601 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:46:18,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:18,620 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 06:46:18,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 30 [2021-06-05 06:46:18,621 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:18,757 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:46:18,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:18,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:18,776 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-06-05 06:46:18,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-06-05 06:46:18,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:18,915 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-05 06:46:18,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:18,932 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:18,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2021-06-05 06:46:18,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:19,064 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:46:19,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:19,085 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 06:46:19,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 06:46:19,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:19,208 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:46:19,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:19,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:19,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-06-05 06:46:19,229 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:19,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:19,239 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-05 06:46:19,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 18 [2021-06-05 06:46:19,241 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:19,446 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-05 06:46:19,446 INFO L628 ElimStorePlain]: treesize reduction 23, result has 92.5 percent of original size [2021-06-05 06:46:19,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:46:19,477 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:679, output treesize:449 [2021-06-05 06:46:19,697 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-05 06:46:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:19,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928334672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:19,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:19,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:46:19,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926061437] [2021-06-05 06:46:19,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:46:19,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:46:19,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:46:19,790 INFO L87 Difference]: Start difference. First operand 1405 states and 4638 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:20,818 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-05 06:46:20,971 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2021-06-05 06:46:21,201 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2021-06-05 06:46:21,572 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 06:46:21,768 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 06:46:22,007 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-05 06:46:22,374 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-05 06:46:22,940 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2021-06-05 06:46:23,249 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-06-05 06:46:23,437 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 06:46:24,034 WARN L205 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-05 06:46:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:24,532 INFO L93 Difference]: Finished difference Result 2194 states and 6873 transitions. [2021-06-05 06:46:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:46:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:24,535 INFO L225 Difference]: With dead ends: 2194 [2021-06-05 06:46:24,535 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 06:46:24,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 4745.1ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:46:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 06:46:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1416. [2021-06-05 06:46:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.311660777385159) internal successors, (4686), 1415 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4686 transitions. [2021-06-05 06:46:24,555 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4686 transitions. Word has length 26 [2021-06-05 06:46:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:24,555 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4686 transitions. [2021-06-05 06:46:24,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4686 transitions. [2021-06-05 06:46:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:24,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:24,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:24,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 06:46:24,758 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-05 06:46:24,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:24,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318955166] [2021-06-05 06:46:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:24,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318955166] [2021-06-05 06:46:24,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318955166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:24,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810477956] [2021-06-05 06:46:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:46:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:46:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:25,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:25,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:25,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:25,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:25,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:25,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:46:25,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:25,743 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.4 percent of original size [2021-06-05 06:46:25,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_32 vanished before elimination [2021-06-05 06:46:25,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:25,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:25,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:25,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:25,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:25,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:46:25,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:25,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:25,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:46:25,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-06-05 06:46:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:25,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810477956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:25,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:25,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:46:25,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708128550] [2021-06-05 06:46:25,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:46:25,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:25,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:46:25,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:46:25,841 INFO L87 Difference]: Start difference. First operand 1416 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:26,642 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-05 06:46:26,798 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-06-05 06:46:27,110 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 51 [2021-06-05 06:46:27,270 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-05 06:46:27,519 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-05 06:46:27,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:27,641 INFO L93 Difference]: Finished difference Result 2242 states and 7148 transitions. [2021-06-05 06:46:27,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:46:27,641 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:27,645 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 06:46:27,645 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 06:46:27,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1915.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:46:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 06:46:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1446. [2021-06-05 06:46:27,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3217993079584773) internal successors, (4800), 1445 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4800 transitions. [2021-06-05 06:46:27,666 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4800 transitions. Word has length 26 [2021-06-05 06:46:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:27,666 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4800 transitions. [2021-06-05 06:46:27,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4800 transitions. [2021-06-05 06:46:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:27,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:27,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:27,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:27,869 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:27,869 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-05 06:46:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:27,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748822781] [2021-06-05 06:46:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:28,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748822781] [2021-06-05 06:46:28,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748822781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:28,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751157179] [2021-06-05 06:46:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:28,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:46:28,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:46:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:28,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:46:28,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:28,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 06:46:28,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:28,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:28,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:28,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:28,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:46:28,635 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:28,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:28,648 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:28,653 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:28,660 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:28,664 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:28,668 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:28,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:28,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:28,671 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:28,689 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:46:28,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:28,690 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 06:46:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:28,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751157179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:28,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:28,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:46:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369830011] [2021-06-05 06:46:28,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:46:28,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:28,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:46:28,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:46:28,717 INFO L87 Difference]: Start difference. First operand 1446 states and 4800 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:29,191 INFO L93 Difference]: Finished difference Result 1751 states and 5745 transitions. [2021-06-05 06:46:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:46:29,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:29,194 INFO L225 Difference]: With dead ends: 1751 [2021-06-05 06:46:29,194 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 06:46:29,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 678.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:46:29,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 06:46:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1455. [2021-06-05 06:46:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1454 states have (on average 3.3259972489683634) internal successors, (4836), 1454 states have internal predecessors, (4836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 4836 transitions. [2021-06-05 06:46:29,211 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 4836 transitions. Word has length 26 [2021-06-05 06:46:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:29,211 INFO L482 AbstractCegarLoop]: Abstraction has 1455 states and 4836 transitions. [2021-06-05 06:46:29,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 4836 transitions. [2021-06-05 06:46:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:29,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:29,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:29,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-06-05 06:46:29,414 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:29,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:29,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-06-05 06:46:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:29,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522845572] [2021-06-05 06:46:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:29,588 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 06:46:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:29,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:29,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522845572] [2021-06-05 06:46:29,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522845572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:29,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972751376] [2021-06-05 06:46:29,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:29,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:46:29,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:46:29,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:29,956 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:29,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:29,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:29,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:29,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:29,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:29,974 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:29,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:46:29,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:29,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:29,986 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:29,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:29,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:29,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:29,997 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:46:29,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:30,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:46:30,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,031 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:30,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,044 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:46:30,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:46:30,056 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:30,063 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,072 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:46:30,072 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,079 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:30,080 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,087 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:46:30,088 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,102 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:30,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,110 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:30,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:30,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:30,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:46:30,120 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:30,175 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-05 06:46:30,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:46:30,176 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-05 06:46:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972751376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:30,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:30,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:46:30,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161999776] [2021-06-05 06:46:30,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:46:30,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:30,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:46:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:46:30,263 INFO L87 Difference]: Start difference. First operand 1455 states and 4836 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:31,546 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-06-05 06:46:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:32,169 INFO L93 Difference]: Finished difference Result 2518 states and 8034 transitions. [2021-06-05 06:46:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:46:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:32,173 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 06:46:32,173 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 06:46:32,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1895.5ms TimeCoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:46:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 06:46:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1471. [2021-06-05 06:46:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.336734693877551) internal successors, (4905), 1470 states have internal predecessors, (4905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4905 transitions. [2021-06-05 06:46:32,195 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4905 transitions. Word has length 26 [2021-06-05 06:46:32,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:32,196 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4905 transitions. [2021-06-05 06:46:32,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4905 transitions. [2021-06-05 06:46:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:32,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:32,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:32,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 06:46:32,398 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:32,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:32,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-06-05 06:46:32,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:32,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553785725] [2021-06-05 06:46:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:32,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:32,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553785725] [2021-06-05 06:46:32,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553785725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:32,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471453294] [2021-06-05 06:46:32,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:32,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:46:32,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:32,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:46:32,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:33,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:46:33,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,086 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:33,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-05 06:46:33,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:33,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:46:33,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,122 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:33,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:33,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,152 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:33,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:46:33,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,165 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:46:33,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,176 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:46:33,177 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:46:33,189 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,200 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:46:33,201 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,210 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:33,211 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,222 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:46:33,223 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,234 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-05 06:46:33,244 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:46:33,260 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,271 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 06:46:33,273 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:33,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:33,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:33,282 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:33,349 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-05 06:46:33,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:46:33,350 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-05 06:46:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:33,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471453294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:33,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:33,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:46:33,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484505163] [2021-06-05 06:46:33,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:46:33,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:46:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:46:33,428 INFO L87 Difference]: Start difference. First operand 1471 states and 4905 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:34,754 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-06-05 06:46:35,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:35,476 INFO L93 Difference]: Finished difference Result 2131 states and 6893 transitions. [2021-06-05 06:46:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:46:35,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:35,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:35,479 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 06:46:35,479 INFO L226 Difference]: Without dead ends: 2101 [2021-06-05 06:46:35,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2101.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:46:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-06-05 06:46:35,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1480. [2021-06-05 06:46:35,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 3.342799188640974) internal successors, (4944), 1479 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 4944 transitions. [2021-06-05 06:46:35,500 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 4944 transitions. Word has length 26 [2021-06-05 06:46:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:35,500 INFO L482 AbstractCegarLoop]: Abstraction has 1480 states and 4944 transitions. [2021-06-05 06:46:35,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 4944 transitions. [2021-06-05 06:46:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:35,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:35,503 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:35,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2021-06-05 06:46:35,709 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash -165503173, now seen corresponding path program 13 times [2021-06-05 06:46:35,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:35,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798848920] [2021-06-05 06:46:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:36,051 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-05 06:46:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:36,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:36,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798848920] [2021-06-05 06:46:36,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798848920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:36,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711190212] [2021-06-05 06:46:36,227 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:46:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:36,671 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_36], 2=[A, v_prenex_34]} [2021-06-05 06:46:36,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:46:36,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:36,770 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 06:46:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:36,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:36,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:46:36,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:36,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:36,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:36,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:46:36,800 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:36,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:36,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:36,818 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:15 [2021-06-05 06:46:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:36,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711190212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:36,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:36,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:46:36,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306978022] [2021-06-05 06:46:36,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:46:36,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:36,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:46:36,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:46:36,844 INFO L87 Difference]: Start difference. First operand 1480 states and 4944 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:37,651 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-05 06:46:37,815 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-05 06:46:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:38,115 INFO L93 Difference]: Finished difference Result 2125 states and 6803 transitions. [2021-06-05 06:46:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:46:38,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:38,118 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 06:46:38,118 INFO L226 Difference]: Without dead ends: 2110 [2021-06-05 06:46:38,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1560.5ms TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:46:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-05 06:46:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1482. [2021-06-05 06:46:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.3430114787305873) internal successors, (4951), 1481 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4951 transitions. [2021-06-05 06:46:38,138 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4951 transitions. Word has length 26 [2021-06-05 06:46:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:38,138 INFO L482 AbstractCegarLoop]: Abstraction has 1482 states and 4951 transitions. [2021-06-05 06:46:38,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:38,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4951 transitions. [2021-06-05 06:46:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:38,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:38,140 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:38,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 06:46:38,341 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-05 06:46:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:38,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504083762] [2021-06-05 06:46:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:38,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504083762] [2021-06-05 06:46:38,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504083762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210459554] [2021-06-05 06:46:38,639 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:38,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:46:38,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:46:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:46:39,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:46:39,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:39,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:39,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:39,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:46:39,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:39,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:46:39,279 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:46:39,289 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:46:39,298 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:46:39,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:46:39,319 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:46:39,328 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:46:39,338 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:39,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:39,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:46:39,343 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:39,365 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:46:39,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:39,366 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:46:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:39,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210459554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:39,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:39,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 06:46:39,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880180275] [2021-06-05 06:46:39,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:46:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:46:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:46:39,397 INFO L87 Difference]: Start difference. First operand 1482 states and 4951 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:40,082 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 06:46:41,068 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 06:46:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:42,323 INFO L93 Difference]: Finished difference Result 3327 states and 10302 transitions. [2021-06-05 06:46:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:46:42,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:42,327 INFO L225 Difference]: With dead ends: 3327 [2021-06-05 06:46:42,327 INFO L226 Difference]: Without dead ends: 3282 [2021-06-05 06:46:42,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 2631.4ms TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:46:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-06-05 06:46:42,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 1496. [2021-06-05 06:46:42,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3545150501672243) internal successors, (5015), 1495 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5015 transitions. [2021-06-05 06:46:42,354 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5015 transitions. Word has length 26 [2021-06-05 06:46:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:42,354 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5015 transitions. [2021-06-05 06:46:42,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5015 transitions. [2021-06-05 06:46:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:42,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:42,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:42,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 06:46:42,557 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1424367203, now seen corresponding path program 14 times [2021-06-05 06:46:42,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:42,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434383440] [2021-06-05 06:46:42,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:42,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:42,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434383440] [2021-06-05 06:46:42,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434383440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:42,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579918019] [2021-06-05 06:46:42,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:42,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:46:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:46:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:43,262 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 06:46:43,753 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:46:43,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:46:43,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:44,131 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 149 [2021-06-05 06:46:44,132 INFO L628 ElimStorePlain]: treesize reduction 201, result has 67.0 percent of original size [2021-06-05 06:46:44,154 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:46:44,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:46:44,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:44,291 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:46:44,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:44,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-05 06:46:44,315 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:46:44,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:46:44,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:44,453 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-06-05 06:46:44,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:44,472 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:46:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:46:44,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:44,608 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-05 06:46:44,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:44,627 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:46:44,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:46:44,629 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:44,757 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-05 06:46:44,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:44,778 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:46:44,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 06:46:44,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:44,908 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 06:46:44,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:44,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:44,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:46:44,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:45,057 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:46:45,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:46:45,078 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:45,224 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-05 06:46:45,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,244 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:46:45,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:46:45,247 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:45,376 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:46:45,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:46:45,393 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:45,515 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 06:46:45,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,531 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:46:45,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:46:45,535 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:45,650 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 06:46:45,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:45,651 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 06:46:45,651 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-06-05 06:46:45,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:46:45,664 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:455 [2021-06-05 06:46:45,872 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-06-05 06:46:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:45,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579918019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:45,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:45,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:46:45,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166192694] [2021-06-05 06:46:45,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:46:45,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:45,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:46:45,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:46:45,992 INFO L87 Difference]: Start difference. First operand 1496 states and 5015 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:46,403 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-05 06:46:46,822 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2021-06-05 06:46:47,637 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 06:46:48,065 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-05 06:46:48,565 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-05 06:46:48,971 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 06:46:49,498 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2021-06-05 06:46:50,093 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2021-06-05 06:46:50,349 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-05 06:46:50,532 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-06-05 06:46:50,868 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2021-06-05 06:46:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:51,143 INFO L93 Difference]: Finished difference Result 2583 states and 8123 transitions. [2021-06-05 06:46:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:46:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:51,147 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 06:46:51,147 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 06:46:51,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 5497.1ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:46:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 06:46:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1496. [2021-06-05 06:46:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 3.3531772575250836) internal successors, (5013), 1495 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5013 transitions. [2021-06-05 06:46:51,176 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5013 transitions. Word has length 26 [2021-06-05 06:46:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:51,176 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 5013 transitions. [2021-06-05 06:46:51,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5013 transitions. [2021-06-05 06:46:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:51,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:51,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:51,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:51,379 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:51,379 INFO L82 PathProgramCache]: Analyzing trace with hash 39724387, now seen corresponding path program 15 times [2021-06-05 06:46:51,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:51,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499602518] [2021-06-05 06:46:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:51,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499602518] [2021-06-05 06:46:51,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499602518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:51,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971474164] [2021-06-05 06:46:51,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:46:51,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:46:51,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:46:51,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:52,052 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 06:46:52,282 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 06:46:52,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:52,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:52,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:46:52,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:52,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:52,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:46:52,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:52,712 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 121 [2021-06-05 06:46:52,713 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.5 percent of original size [2021-06-05 06:46:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:52,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:52,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:46:52,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:52,849 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 06:46:52,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:52,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:52,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:46:52,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:52,982 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:46:52,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:52,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:46:52,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:53,112 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 06:46:53,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:53,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:46:53,126 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:53,235 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 06:46:53,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:53,246 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:46:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:46:53,247 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:53,351 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 06:46:53,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:53,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:46:53,368 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:53,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:53,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:46:53,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:46:53,378 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:53,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:53,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:46:53,475 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:53,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:46:53,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:46:53,558 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 16 variables, input treesize:563, output treesize:158 [2021-06-05 06:46:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:53,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971474164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:53,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:53,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:46:53,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108270178] [2021-06-05 06:46:53,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:46:53,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:46:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:46:53,705 INFO L87 Difference]: Start difference. First operand 1496 states and 5013 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:54,736 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-06-05 06:46:55,226 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 06:46:55,611 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 06:46:55,929 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 06:46:56,461 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-05 06:46:56,849 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2021-06-05 06:46:57,335 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 73 [2021-06-05 06:46:57,828 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 06:46:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:46:57,940 INFO L93 Difference]: Finished difference Result 2835 states and 8886 transitions. [2021-06-05 06:46:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:46:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:46:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:46:57,944 INFO L225 Difference]: With dead ends: 2835 [2021-06-05 06:46:57,944 INFO L226 Difference]: Without dead ends: 2805 [2021-06-05 06:46:57,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4328.3ms TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:46:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-06-05 06:46:57,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 1506. [2021-06-05 06:46:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.359468438538206) internal successors, (5056), 1505 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5056 transitions. [2021-06-05 06:46:57,971 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5056 transitions. Word has length 26 [2021-06-05 06:46:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:46:57,972 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5056 transitions. [2021-06-05 06:46:57,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5056 transitions. [2021-06-05 06:46:57,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:46:57,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:46:57,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:46:58,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 06:46:58,174 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:46:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:46:58,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-05 06:46:58,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:46:58,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838430999] [2021-06-05 06:46:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:46:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:46:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:58,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:46:58,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838430999] [2021-06-05 06:46:58,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838430999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:58,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951251303] [2021-06-05 06:46:58,477 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 [2021-06-05 06:46:58,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:46:58,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:46:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:46:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:46:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:46:59,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:46:59,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:46:59,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:59,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:46:59,049 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:46:59,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:46:59,063 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:46:59,078 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:46:59,085 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:46:59,092 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:46:59,099 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:46:59,106 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:59,113 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:46:59,120 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:46:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:46:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:46:59,124 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:46:59,141 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 06:46:59,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:46:59,142 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:46:59,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:46:59,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951251303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:46:59,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:46:59,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 06:46:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650810018] [2021-06-05 06:46:59,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:46:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:46:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:46:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:46:59,168 INFO L87 Difference]: Start difference. First operand 1506 states and 5056 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:46:59,944 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-05 06:47:00,406 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 06:47:00,817 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-05 06:47:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:01,860 INFO L93 Difference]: Finished difference Result 2978 states and 9427 transitions. [2021-06-05 06:47:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:47:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:01,864 INFO L225 Difference]: With dead ends: 2978 [2021-06-05 06:47:01,864 INFO L226 Difference]: Without dead ends: 2933 [2021-06-05 06:47:01,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2454.6ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:47:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2933 states. [2021-06-05 06:47:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2933 to 1506. [2021-06-05 06:47:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 3.3601328903654486) internal successors, (5057), 1505 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 5057 transitions. [2021-06-05 06:47:01,899 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 5057 transitions. Word has length 26 [2021-06-05 06:47:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:01,900 INFO L482 AbstractCegarLoop]: Abstraction has 1506 states and 5057 transitions. [2021-06-05 06:47:01,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 5057 transitions. [2021-06-05 06:47:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:01,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:01,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:02,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:02,125 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:02,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:02,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-05 06:47:02,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:02,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703850523] [2021-06-05 06:47:02,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:02,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:02,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703850523] [2021-06-05 06:47:02,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703850523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:02,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865683393] [2021-06-05 06:47:02,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:02,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:47:02,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:02,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:47:02,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,869 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:47:02,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:47:02,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,892 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:02,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:47:02,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:02,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,913 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:02,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 06:47:02,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,933 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:02,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:02,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,954 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:47:02,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 06:47:02,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:02,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,980 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:47:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 06:47:02,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:02,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:02,997 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:02,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 06:47:02,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,019 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:47:03,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-06-05 06:47:03,022 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,066 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 06:47:03,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:47:03,067 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,081 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:03,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:47:03,082 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,102 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:47:03,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-06-05 06:47:03,103 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,116 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:03,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 06:47:03,117 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,132 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:03,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:03,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,159 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:03,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:47:03,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,176 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:03,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:47:03,182 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:03,190 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:03,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:47:03,191 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:03,267 INFO L628 ElimStorePlain]: treesize reduction 45, result has 67.4 percent of original size [2021-06-05 06:47:03,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:47:03,269 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 06:47:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:03,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865683393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:03,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:03,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 06:47:03,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411562418] [2021-06-05 06:47:03,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:47:03,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:03,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:47:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:47:03,344 INFO L87 Difference]: Start difference. First operand 1506 states and 5057 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:04,099 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-05 06:47:05,149 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2021-06-05 06:47:05,999 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-06-05 06:47:06,119 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-06-05 06:47:06,296 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-06-05 06:47:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:06,825 INFO L93 Difference]: Finished difference Result 3558 states and 11107 transitions. [2021-06-05 06:47:06,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:47:06,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:06,830 INFO L225 Difference]: With dead ends: 3558 [2021-06-05 06:47:06,830 INFO L226 Difference]: Without dead ends: 3498 [2021-06-05 06:47:06,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 3114.3ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:47:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2021-06-05 06:47:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 1522. [2021-06-05 06:47:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-06-05 06:47:06,859 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-06-05 06:47:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:06,859 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-06-05 06:47:06,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-06-05 06:47:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:06,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:06,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:07,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:07,062 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:07,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:07,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 16 times [2021-06-05 06:47:07,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:07,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476350299] [2021-06-05 06:47:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:07,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:07,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476350299] [2021-06-05 06:47:07,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476350299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:07,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106633728] [2021-06-05 06:47:07,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:07,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:47:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:47:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:07,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:07,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:47:07,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:07,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 06:47:07,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:07,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:07,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:07,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:07,980 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:07,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:47:07,992 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:07,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:07,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:07,998 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:47:08,003 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:08,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:08,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:08,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:08,008 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:08,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:08,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:47:08,012 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:08,029 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:47:08,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:47:08,031 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 06:47:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:08,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106633728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:08,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:08,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:47:08,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29118707] [2021-06-05 06:47:08,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:47:08,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:47:08,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:47:08,053 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:08,710 INFO L93 Difference]: Finished difference Result 1905 states and 6288 transitions. [2021-06-05 06:47:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:47:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:08,713 INFO L225 Difference]: With dead ends: 1905 [2021-06-05 06:47:08,713 INFO L226 Difference]: Without dead ends: 1890 [2021-06-05 06:47:08,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 940.6ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:47:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-05 06:47:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1530. [2021-06-05 06:47:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.368214519293656) internal successors, (5150), 1529 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5150 transitions. [2021-06-05 06:47:08,733 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5150 transitions. Word has length 26 [2021-06-05 06:47:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:08,734 INFO L482 AbstractCegarLoop]: Abstraction has 1530 states and 5150 transitions. [2021-06-05 06:47:08,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:08,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5150 transitions. [2021-06-05 06:47:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:08,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:08,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:08,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:08,936 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1807218181, now seen corresponding path program 17 times [2021-06-05 06:47:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:08,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262290569] [2021-06-05 06:47:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:09,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:09,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262290569] [2021-06-05 06:47:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262290569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:09,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678233452] [2021-06-05 06:47:09,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:09,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:47:09,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:09,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:09,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:09,959 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-05 06:47:10,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:10,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:10,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:10,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:10,196 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-05 06:47:10,196 INFO L628 ElimStorePlain]: treesize reduction 55, result has 71.1 percent of original size [2021-06-05 06:47:10,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:10,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:10,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:10,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:10,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:10,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:10,261 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.2 percent of original size [2021-06-05 06:47:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:10,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:10,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:10,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:10,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:10,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:47:10,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:211, output treesize:25 [2021-06-05 06:47:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:10,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678233452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:10,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:10,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:47:10,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965679903] [2021-06-05 06:47:10,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:47:10,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:47:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:47:10,328 INFO L87 Difference]: Start difference. First operand 1530 states and 5150 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:11,033 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-06-05 06:47:11,372 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2021-06-05 06:47:11,645 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 06:47:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:11,900 INFO L93 Difference]: Finished difference Result 2016 states and 6558 transitions. [2021-06-05 06:47:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:47:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:11,904 INFO L225 Difference]: With dead ends: 2016 [2021-06-05 06:47:11,904 INFO L226 Difference]: Without dead ends: 1971 [2021-06-05 06:47:11,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1952.4ms TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:47:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-05 06:47:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1522. [2021-06-05 06:47:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.3721236028928336) internal successors, (5129), 1521 states have internal predecessors, (5129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:11,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5129 transitions. [2021-06-05 06:47:11,935 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5129 transitions. Word has length 26 [2021-06-05 06:47:11,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:11,935 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 5129 transitions. [2021-06-05 06:47:11,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5129 transitions. [2021-06-05 06:47:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:11,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:11,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:12,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1115 [2021-06-05 06:47:12,153 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 18 times [2021-06-05 06:47:12,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:12,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379115434] [2021-06-05 06:47:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:12,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:12,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379115434] [2021-06-05 06:47:12,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379115434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:12,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336287741] [2021-06-05 06:47:12,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:12,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:47:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:47:12,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,815 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:12,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:12,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:47:12,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,844 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:12,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,856 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:12,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,867 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:12,868 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,875 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:12,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,884 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:12,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,904 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:12,905 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,918 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:12,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:47:12,920 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,933 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:12,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:47:12,935 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,944 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:12,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,953 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:12,954 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:12,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:47:12,966 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,973 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:12,974 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:12,982 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:12,987 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:12,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:12,988 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:13,053 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.5 percent of original size [2021-06-05 06:47:13,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:47:13,056 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:71 [2021-06-05 06:47:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:13,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336287741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:13,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:13,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:47:13,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628883020] [2021-06-05 06:47:13,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:13,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:13,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:13,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:13,136 INFO L87 Difference]: Start difference. First operand 1522 states and 5129 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:13,628 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 06:47:14,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:14,215 INFO L93 Difference]: Finished difference Result 1999 states and 6574 transitions. [2021-06-05 06:47:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:47:14,215 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:14,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:14,218 INFO L225 Difference]: With dead ends: 1999 [2021-06-05 06:47:14,218 INFO L226 Difference]: Without dead ends: 1984 [2021-06-05 06:47:14,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1162.0ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:47:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-05 06:47:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1516. [2021-06-05 06:47:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.3716171617161717) internal successors, (5108), 1515 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 5108 transitions. [2021-06-05 06:47:14,242 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 5108 transitions. Word has length 26 [2021-06-05 06:47:14,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:14,242 INFO L482 AbstractCegarLoop]: Abstraction has 1516 states and 5108 transitions. [2021-06-05 06:47:14,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 5108 transitions. [2021-06-05 06:47:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:14,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:14,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:14,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1138,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:14,444 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:14,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 19 times [2021-06-05 06:47:14,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:14,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895460564] [2021-06-05 06:47:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:14,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:14,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895460564] [2021-06-05 06:47:14,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895460564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:14,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111912316] [2021-06-05 06:47:14,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:14,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:47:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:15,468 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_133], 2=[A, v_prenex_132]} [2021-06-05 06:47:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:47:15,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:15,555 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 06:47:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:15,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:15,558 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 23 treesize of output 13 [2021-06-05 06:47:15,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:15,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:15,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:15,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:15,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:15,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:15,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:15,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:15,645 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 06:47:15,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:47:15,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-05 06:47:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:15,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111912316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:15,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:15,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:47:15,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217744969] [2021-06-05 06:47:15,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:47:15,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:15,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:47:15,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:47:15,678 INFO L87 Difference]: Start difference. First operand 1516 states and 5108 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:16,491 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 06:47:16,806 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-05 06:47:16,961 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-06-05 06:47:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:17,061 INFO L93 Difference]: Finished difference Result 2061 states and 6772 transitions. [2021-06-05 06:47:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:47:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:17,064 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 06:47:17,064 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 06:47:17,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1831.2ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:47:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 06:47:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1517. [2021-06-05 06:47:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-06-05 06:47:17,092 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-06-05 06:47:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:17,092 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-06-05 06:47:17,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-06-05 06:47:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:17,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:17,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:17,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-06-05 06:47:17,295 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 20 times [2021-06-05 06:47:17,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:17,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133144724] [2021-06-05 06:47:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:17,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133144724] [2021-06-05 06:47:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133144724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823166289] [2021-06-05 06:47:17,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:17,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:47:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:17,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,127 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:18,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:47:18,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:18,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:47:18,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,259 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:47:18,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,298 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:47:18,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,316 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:18,317 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:47:18,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,429 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-05 06:47:18,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:18,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,449 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:18,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:47:18,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,467 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:18,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:47:18,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,572 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-05 06:47:18,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:18,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:18,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:47:18,593 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:18,607 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:18,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:47:18,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:18,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:18,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:47:18,713 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:329, output treesize:224 [2021-06-05 06:47:18,874 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-06-05 06:47:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:18,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823166289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:18,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:18,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:47:18,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670165392] [2021-06-05 06:47:18,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:47:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:47:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:47:18,905 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:20,460 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-05 06:47:20,636 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 06:47:20,895 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-05 06:47:21,064 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-05 06:47:21,246 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-05 06:47:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:21,416 INFO L93 Difference]: Finished difference Result 2205 states and 7070 transitions. [2021-06-05 06:47:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:47:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:21,419 INFO L225 Difference]: With dead ends: 2205 [2021-06-05 06:47:21,419 INFO L226 Difference]: Without dead ends: 2165 [2021-06-05 06:47:21,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2638.2ms TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:47:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-06-05 06:47:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 1566. [2021-06-05 06:47:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3686900958466452) internal successors, (5272), 1565 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5272 transitions. [2021-06-05 06:47:21,438 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5272 transitions. Word has length 26 [2021-06-05 06:47:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:21,438 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5272 transitions. [2021-06-05 06:47:21,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5272 transitions. [2021-06-05 06:47:21,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:21,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:21,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:21,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-05 06:47:21,642 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:21,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1409101781, now seen corresponding path program 21 times [2021-06-05 06:47:21,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:21,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972784225] [2021-06-05 06:47:21,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:21,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:21,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972784225] [2021-06-05 06:47:21,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972784225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:21,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847713180] [2021-06-05 06:47:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:21,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:47:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:47:21,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:22,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:22,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:47:22,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:22,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:47:22,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,256 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:22,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,266 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:22,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,274 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:22,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,286 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:22,287 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,295 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:22,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,313 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:47:22,316 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,333 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:47:22,336 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,352 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:22,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:47:22,353 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,362 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:22,363 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,371 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:22,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,381 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2021-06-05 06:47:22,382 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,389 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:22,390 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,404 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:22,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:47:22,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,410 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:47:22,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:22,411 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:22,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:22,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:47:22,468 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-06-05 06:47:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:22,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847713180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:22,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:22,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:47:22,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609827393] [2021-06-05 06:47:22,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:22,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:22,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:22,724 INFO L87 Difference]: Start difference. First operand 1566 states and 5272 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:23,485 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 06:47:23,601 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-06-05 06:47:24,122 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-05 06:47:24,288 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-05 06:47:24,614 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-06-05 06:47:24,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:24,769 INFO L93 Difference]: Finished difference Result 2352 states and 7640 transitions. [2021-06-05 06:47:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:47:24,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:24,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:24,773 INFO L225 Difference]: With dead ends: 2352 [2021-06-05 06:47:24,773 INFO L226 Difference]: Without dead ends: 2327 [2021-06-05 06:47:24,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2168.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:47:24,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-06-05 06:47:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1537. [2021-06-05 06:47:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.373046875) internal successors, (5181), 1536 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5181 transitions. [2021-06-05 06:47:24,793 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5181 transitions. Word has length 26 [2021-06-05 06:47:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:24,794 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5181 transitions. [2021-06-05 06:47:24,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5181 transitions. [2021-06-05 06:47:24,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:24,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:24,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:25,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:25,019 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 22 times [2021-06-05 06:47:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:25,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030012620] [2021-06-05 06:47:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:25,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030012620] [2021-06-05 06:47:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030012620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327213930] [2021-06-05 06:47:25,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:25,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:47:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:25,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:25,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:25,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:25,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:25,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:47:25,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:25,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:25,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:25,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:25,540 INFO L628 ElimStorePlain]: treesize reduction 108, result has 42.2 percent of original size [2021-06-05 06:47:25,540 INFO L518 ElimStorePlain]: Eliminatee v_prenex_151 vanished before elimination [2021-06-05 06:47:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:25,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:47:25,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:25,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:25,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:25,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:25,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:25,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:47:25,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:24 [2021-06-05 06:47:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:25,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327213930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:25,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:25,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:47:25,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607500641] [2021-06-05 06:47:25,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:47:25,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:47:25,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:47:25,618 INFO L87 Difference]: Start difference. First operand 1537 states and 5181 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:25,945 INFO L93 Difference]: Finished difference Result 1678 states and 5570 transitions. [2021-06-05 06:47:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:47:25,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:25,948 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 06:47:25,948 INFO L226 Difference]: Without dead ends: 1663 [2021-06-05 06:47:25,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:47:25,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2021-06-05 06:47:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1561. [2021-06-05 06:47:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 3.3705128205128205) internal successors, (5258), 1560 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 5258 transitions. [2021-06-05 06:47:25,966 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 5258 transitions. Word has length 26 [2021-06-05 06:47:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:25,966 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 5258 transitions. [2021-06-05 06:47:25,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 5258 transitions. [2021-06-05 06:47:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:25,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:25,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:26,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1317,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:26,173 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 23 times [2021-06-05 06:47:26,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:26,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561578083] [2021-06-05 06:47:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:26,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561578083] [2021-06-05 06:47:26,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561578083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:26,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853185469] [2021-06-05 06:47:26,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:26,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:47:26,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:26,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,671 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:26,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,681 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:26,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,694 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:26,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:47:26,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:26,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:47:26,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:26,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:47:26,739 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:26,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:47:26,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:26,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:47:26,780 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,789 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:26,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,801 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:26,801 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,810 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:26,811 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,820 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:26,821 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,830 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:26,831 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:26,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:26,853 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:26,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:26,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:47:26,864 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:26,935 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-05 06:47:26,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:47:26,937 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-05 06:47:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:27,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853185469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:27,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:27,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:47:27,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000281741] [2021-06-05 06:47:27,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:27,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:27,045 INFO L87 Difference]: Start difference. First operand 1561 states and 5258 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:27,892 INFO L93 Difference]: Finished difference Result 2101 states and 6894 transitions. [2021-06-05 06:47:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:47:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:27,895 INFO L225 Difference]: With dead ends: 2101 [2021-06-05 06:47:27,895 INFO L226 Difference]: Without dead ends: 2076 [2021-06-05 06:47:27,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 971.6ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:47:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-06-05 06:47:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1550. [2021-06-05 06:47:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.378954163976759) internal successors, (5234), 1549 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5234 transitions. [2021-06-05 06:47:27,915 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5234 transitions. Word has length 26 [2021-06-05 06:47:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:27,915 INFO L482 AbstractCegarLoop]: Abstraction has 1550 states and 5234 transitions. [2021-06-05 06:47:27,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5234 transitions. [2021-06-05 06:47:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:27,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:27,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:28,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 06:47:28,129 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 24 times [2021-06-05 06:47:28,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:28,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321463640] [2021-06-05 06:47:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:28,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:28,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321463640] [2021-06-05 06:47:28,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321463640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:28,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431343307] [2021-06-05 06:47:28,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:28,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:47:28,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:28,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:28,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,787 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:47:28,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:28,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:47:28,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:28,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,823 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:28,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,836 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 06:47:28,838 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:28,850 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:28,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:47:28,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,876 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:47:28,877 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:47:28,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,901 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:28,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:47:28,903 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:47:28,916 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,928 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:28,930 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:28,943 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,953 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:28,954 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:28,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:47:28,970 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:28,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:28,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:28,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:28,977 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:29,038 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-05 06:47:29,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:47:29,039 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-05 06:47:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:29,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431343307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:29,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:29,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:47:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235194849] [2021-06-05 06:47:29,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:29,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:29,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:29,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:29,115 INFO L87 Difference]: Start difference. First operand 1550 states and 5234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:30,280 INFO L93 Difference]: Finished difference Result 2118 states and 6970 transitions. [2021-06-05 06:47:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:47:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:30,284 INFO L225 Difference]: With dead ends: 2118 [2021-06-05 06:47:30,284 INFO L226 Difference]: Without dead ends: 2084 [2021-06-05 06:47:30,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1357.4ms TimeCoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:47:30,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-06-05 06:47:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1569. [2021-06-05 06:47:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.3832908163265305) internal successors, (5305), 1568 states have internal predecessors, (5305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:30,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5305 transitions. [2021-06-05 06:47:30,304 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5305 transitions. Word has length 26 [2021-06-05 06:47:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:30,304 INFO L482 AbstractCegarLoop]: Abstraction has 1569 states and 5305 transitions. [2021-06-05 06:47:30,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5305 transitions. [2021-06-05 06:47:30,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:30,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:30,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:30,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-06-05 06:47:30,506 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:30,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 25 times [2021-06-05 06:47:30,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:30,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141303222] [2021-06-05 06:47:30,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:30,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141303222] [2021-06-05 06:47:30,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141303222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:30,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197542394] [2021-06-05 06:47:30,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:31,422 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:31,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:47:31,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:31,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:31,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:47:31,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:31,835 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-06-05 06:47:31,836 INFO L628 ElimStorePlain]: treesize reduction 33, result has 92.4 percent of original size [2021-06-05 06:47:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:31,856 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:31,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:47:31,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:31,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:31,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:31,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:47:31,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,022 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-05 06:47:32,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:32,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:32,044 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:47:32,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:32,064 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:47:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:47:32,067 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,213 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 06:47:32,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:32,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:32,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:32,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:47:32,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:32,256 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:47:32,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,523 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-05 06:47:32,524 INFO L628 ElimStorePlain]: treesize reduction 16, result has 95.3 percent of original size [2021-06-05 06:47:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:32,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:32,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:47:32,552 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:32,571 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:47:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:47:32,573 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:32,803 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 06:47:32,804 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-06-05 06:47:32,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:47:32,823 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:253 [2021-06-05 06:47:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:32,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197542394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:32,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:32,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:47:32,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828081349] [2021-06-05 06:47:32,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:47:32,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:47:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:47:32,976 INFO L87 Difference]: Start difference. First operand 1569 states and 5305 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:33,417 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-06-05 06:47:34,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:34,090 INFO L93 Difference]: Finished difference Result 2132 states and 7032 transitions. [2021-06-05 06:47:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:47:34,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:34,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:34,093 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 06:47:34,093 INFO L226 Difference]: Without dead ends: 2107 [2021-06-05 06:47:34,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1402.9ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:47:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2021-06-05 06:47:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1575. [2021-06-05 06:47:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.3818297331639138) internal successors, (5323), 1574 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5323 transitions. [2021-06-05 06:47:34,120 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5323 transitions. Word has length 26 [2021-06-05 06:47:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:34,120 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 5323 transitions. [2021-06-05 06:47:34,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5323 transitions. [2021-06-05 06:47:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:34,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:34,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:34,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1364 [2021-06-05 06:47:34,323 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-05 06:47:34,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:34,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023776046] [2021-06-05 06:47:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:34,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023776046] [2021-06-05 06:47:34,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023776046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491928489] [2021-06-05 06:47:34,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:34,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:47:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:35,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:35,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:47:35,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:47:35,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:47:35,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:47:35,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:47:35,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:47:35,211 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:47:35,217 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:47:35,224 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:47:35,230 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:47:35,237 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:47:35,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:47:35,249 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:47:35,255 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:35,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:47:35,259 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:35,275 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 06:47:35,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:47:35,277 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:47:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:35,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491928489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:35,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:35,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:47:35,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913729518] [2021-06-05 06:47:35,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:35,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:35,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:35,297 INFO L87 Difference]: Start difference. First operand 1575 states and 5323 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:36,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:36,261 INFO L93 Difference]: Finished difference Result 2018 states and 6640 transitions. [2021-06-05 06:47:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:47:36,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:36,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:36,265 INFO L225 Difference]: With dead ends: 2018 [2021-06-05 06:47:36,265 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 06:47:36,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1037.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:47:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 06:47:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1579. [2021-06-05 06:47:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-06-05 06:47:36,285 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-06-05 06:47:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:36,285 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-06-05 06:47:36,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-06-05 06:47:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:36,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:36,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:36,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1438,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:36,505 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-05 06:47:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:36,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050645360] [2021-06-05 06:47:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:36,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:36,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050645360] [2021-06-05 06:47:36,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050645360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:36,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552633102] [2021-06-05 06:47:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:47:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:37,140 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_163], 5=[v_prenex_165, v_prenex_167]} [2021-06-05 06:47:37,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:37,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:37,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:37,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:37,221 INFO L628 ElimStorePlain]: treesize reduction 135, result has 43.3 percent of original size [2021-06-05 06:47:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:37,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:37,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:37,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:37,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:37,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:37,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:47:37,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:37,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:37,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:37,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:37,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:47:37,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:37,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:37,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:47:37,296 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:24 [2021-06-05 06:47:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:37,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552633102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:37,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:37,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:47:37,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930657966] [2021-06-05 06:47:37,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:37,330 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:38,846 INFO L93 Difference]: Finished difference Result 2235 states and 7337 transitions. [2021-06-05 06:47:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:47:38,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:38,850 INFO L225 Difference]: With dead ends: 2235 [2021-06-05 06:47:38,850 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 06:47:38,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1556.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:47:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 06:47:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1579. [2021-06-05 06:47:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.379594423320659) internal successors, (5333), 1578 states have internal predecessors, (5333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5333 transitions. [2021-06-05 06:47:38,871 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5333 transitions. Word has length 26 [2021-06-05 06:47:38,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:38,871 INFO L482 AbstractCegarLoop]: Abstraction has 1579 states and 5333 transitions. [2021-06-05 06:47:38,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5333 transitions. [2021-06-05 06:47:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:38,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:38,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:39,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-05 06:47:39,074 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 26 times [2021-06-05 06:47:39,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:39,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973635353] [2021-06-05 06:47:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:39,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:39,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973635353] [2021-06-05 06:47:39,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973635353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:39,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640682304] [2021-06-05 06:47:39,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:39,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:47:39,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:47:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:39,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,677 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:47:39,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:39,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:47:39,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,712 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:39,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,720 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:47:39,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,732 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 06:47:39,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,742 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:39,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,754 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:39,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:47:39,756 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,765 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:47:39,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,774 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:47:39,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,799 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:47:39,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:47:39,801 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,811 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:47:39,812 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,824 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:39,825 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:39,834 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,841 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:47:39,842 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:39,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:47:39,854 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:39,859 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:47:39,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:39,859 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:39,923 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-05 06:47:39,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:47:39,924 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-05 06:47:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640682304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:39,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:39,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:47:39,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571740414] [2021-06-05 06:47:39,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:47:39,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:47:39,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:47:39,997 INFO L87 Difference]: Start difference. First operand 1579 states and 5333 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:40,461 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 06:47:40,969 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 06:47:41,134 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-06-05 06:47:41,273 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 06:47:41,461 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-06-05 06:47:41,614 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-06-05 06:47:41,914 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-05 06:47:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:42,111 INFO L93 Difference]: Finished difference Result 2244 states and 7303 transitions. [2021-06-05 06:47:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:47:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:42,115 INFO L225 Difference]: With dead ends: 2244 [2021-06-05 06:47:42,115 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 06:47:42,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 2145.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:47:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 06:47:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1598. [2021-06-05 06:47:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.3844708829054477) internal successors, (5405), 1597 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5405 transitions. [2021-06-05 06:47:42,136 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5405 transitions. Word has length 26 [2021-06-05 06:47:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:42,136 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5405 transitions. [2021-06-05 06:47:42,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5405 transitions. [2021-06-05 06:47:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:42,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:42,138 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:42,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:42,339 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-05 06:47:42,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:42,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992976176] [2021-06-05 06:47:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:42,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:42,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992976176] [2021-06-05 06:47:42,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992976176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:42,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849782156] [2021-06-05 06:47:42,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:42,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:47:42,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:42,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:47:42,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,264 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-05 06:47:43,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-06-05 06:47:43,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,297 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-05 06:47:43,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 26 [2021-06-05 06:47:43,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,320 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:47:43,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 06:47:43,321 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,346 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-05 06:47:43,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 06:47:43,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,373 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:47:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 06:47:43,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,390 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:43,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,406 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 06:47:43,407 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,422 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:47:43,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,440 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:47:43,441 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,456 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:47:43,456 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,470 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:47:43,470 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,484 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:47:43,484 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,497 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:43,498 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,511 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:47:43,511 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:43,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 06:47:43,537 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:43,544 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:47:43,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:43,545 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:43,657 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-06-05 06:47:43,657 INFO L628 ElimStorePlain]: treesize reduction 34, result has 75.2 percent of original size [2021-06-05 06:47:43,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:47:43,659 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:745, output treesize:75 [2021-06-05 06:47:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:43,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849782156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:43,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:43,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 06:47:43,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534484955] [2021-06-05 06:47:43,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:47:43,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:47:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:47:43,725 INFO L87 Difference]: Start difference. First operand 1598 states and 5405 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:45,847 INFO L93 Difference]: Finished difference Result 2476 states and 7899 transitions. [2021-06-05 06:47:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:47:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:45,851 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 06:47:45,851 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 06:47:45,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 2108.5ms TimeCoverageRelationStatistics Valid=508, Invalid=2572, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:47:45,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 06:47:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1605. [2021-06-05 06:47:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.385286783042394) internal successors, (5430), 1604 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5430 transitions. [2021-06-05 06:47:45,871 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5430 transitions. Word has length 26 [2021-06-05 06:47:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:45,871 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5430 transitions. [2021-06-05 06:47:45,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5430 transitions. [2021-06-05 06:47:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:45,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:45,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:46,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1579 [2021-06-05 06:47:46,074 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-05 06:47:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:46,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602675859] [2021-06-05 06:47:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:46,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:46,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602675859] [2021-06-05 06:47:46,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602675859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:46,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636276884] [2021-06-05 06:47:46,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:46,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:47:46,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:47:46,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:46,926 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:47:46,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-05 06:47:46,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:46,986 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:47:46,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 06:47:46,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:46,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,012 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:47:47,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:47,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,060 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 06:47:47,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 06:47:47,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,113 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:47:47,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:47:47,117 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,154 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:47:47,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-05 06:47:47,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,181 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:47:47,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 06:47:47,181 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,225 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 06:47:47,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-06-05 06:47:47,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,265 INFO L354 Elim1Store]: treesize reduction 31, result has 31.1 percent of original size [2021-06-05 06:47:47,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 32 [2021-06-05 06:47:47,267 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,311 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-05 06:47:47,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:47:47,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,337 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:47:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:47:47,338 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,375 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:47:47,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-06-05 06:47:47,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,401 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:47:47,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:47:47,402 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,419 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:47:47,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:47:47,420 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,457 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 06:47:47,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-06-05 06:47:47,462 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:47,474 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:47:47,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:47,475 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:47,854 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-06-05 06:47:47,855 INFO L628 ElimStorePlain]: treesize reduction 194, result has 63.7 percent of original size [2021-06-05 06:47:47,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:47:47,862 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:413 [2021-06-05 06:47:48,080 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-06-05 06:47:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:48,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636276884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:48,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:48,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:47:48,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62227166] [2021-06-05 06:47:48,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:47:48,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:48,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:47:48,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:47:48,243 INFO L87 Difference]: Start difference. First operand 1605 states and 5430 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:50,619 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 06:47:51,242 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-06-05 06:47:51,422 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-05 06:47:51,720 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-05 06:47:51,869 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 06:47:52,092 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-06-05 06:47:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:52,297 INFO L93 Difference]: Finished difference Result 3600 states and 11338 transitions. [2021-06-05 06:47:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:47:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:52,302 INFO L225 Difference]: With dead ends: 3600 [2021-06-05 06:47:52,302 INFO L226 Difference]: Without dead ends: 3564 [2021-06-05 06:47:52,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3893.3ms TimeCoverageRelationStatistics Valid=893, Invalid=4959, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:47:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-05 06:47:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 1759. [2021-06-05 06:47:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.4044368600682593) internal successors, (5985), 1758 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5985 transitions. [2021-06-05 06:47:52,333 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5985 transitions. Word has length 26 [2021-06-05 06:47:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:52,333 INFO L482 AbstractCegarLoop]: Abstraction has 1759 states and 5985 transitions. [2021-06-05 06:47:52,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5985 transitions. [2021-06-05 06:47:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:52,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:52,335 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:52,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-05 06:47:52,537 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:52,537 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-05 06:47:52,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:52,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556631434] [2021-06-05 06:47:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:52,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:52,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556631434] [2021-06-05 06:47:52,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556631434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:52,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526561131] [2021-06-05 06:47:52,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:52,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:47:52,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:52,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:47:52,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:53,214 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 06:47:53,467 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 83 [2021-06-05 06:47:53,663 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_183, v_prenex_187], 6=[A, v_prenex_185]} [2021-06-05 06:47:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:47:53,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:53,784 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-05 06:47:53,784 INFO L628 ElimStorePlain]: treesize reduction 151, result has 44.9 percent of original size [2021-06-05 06:47:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:53,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:47:53,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:53,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:53,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:53,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:47:53,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:47:53,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:53,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:53,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:47:53,891 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:31 [2021-06-05 06:47:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:53,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526561131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:53,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:53,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 06:47:53,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832172942] [2021-06-05 06:47:53,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:47:53,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:53,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:47:53,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:47:53,927 INFO L87 Difference]: Start difference. First operand 1759 states and 5985 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:55,059 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 58 [2021-06-05 06:47:55,723 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 89 [2021-06-05 06:47:55,894 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 06:47:56,227 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 102 [2021-06-05 06:47:56,389 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 06:47:56,650 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2021-06-05 06:47:56,943 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 94 [2021-06-05 06:47:57,258 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 169 [2021-06-05 06:47:57,484 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 74 [2021-06-05 06:47:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:47:57,675 INFO L93 Difference]: Finished difference Result 3623 states and 11573 transitions. [2021-06-05 06:47:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:47:57,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:47:57,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:47:57,681 INFO L225 Difference]: With dead ends: 3623 [2021-06-05 06:47:57,681 INFO L226 Difference]: Without dead ends: 3587 [2021-06-05 06:47:57,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 3523.6ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:47:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-06-05 06:47:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 1939. [2021-06-05 06:47:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.4262125902992775) internal successors, (6640), 1938 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6640 transitions. [2021-06-05 06:47:57,714 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6640 transitions. Word has length 26 [2021-06-05 06:47:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:47:57,714 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6640 transitions. [2021-06-05 06:47:57,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:47:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6640 transitions. [2021-06-05 06:47:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:47:57,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:47:57,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:47:57,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:57,940 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:47:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:47:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-05 06:47:57,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:47:57,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285886283] [2021-06-05 06:47:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:47:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:47:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:58,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:47:58,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285886283] [2021-06-05 06:47:58,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285886283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:58,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251055864] [2021-06-05 06:47:58,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:47:58,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:47:58,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:47:58,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:47:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:47:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,666 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:47:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 06:47:58,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,700 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:47:58,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:47:58,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,719 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:47:58,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,742 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:47:58,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 06:47:58,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,768 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:47:58,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 06:47:58,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 06:47:58,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,816 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:47:58,817 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,830 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:47:58,831 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,845 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:47:58,845 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,859 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-06-05 06:47:58,860 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,872 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:47:58,873 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:47:58,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 06:47:58,899 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,912 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-06-05 06:47:58,912 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,925 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:47:58,926 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,938 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:47:58,939 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:47:58,946 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:47:58,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:47:58,947 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:47:59,055 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-06-05 06:47:59,055 INFO L628 ElimStorePlain]: treesize reduction 56, result has 59.1 percent of original size [2021-06-05 06:47:59,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:47:59,058 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:71 [2021-06-05 06:47:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:47:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251055864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:47:59,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:47:59,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 06:47:59,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889236397] [2021-06-05 06:47:59,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:47:59,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:47:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:47:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:47:59,144 INFO L87 Difference]: Start difference. First operand 1939 states and 6640 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:01,364 INFO L93 Difference]: Finished difference Result 4085 states and 13117 transitions. [2021-06-05 06:48:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:48:01,364 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:01,369 INFO L225 Difference]: With dead ends: 4085 [2021-06-05 06:48:01,369 INFO L226 Difference]: Without dead ends: 4028 [2021-06-05 06:48:01,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 2109.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:48:01,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2021-06-05 06:48:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 2033. [2021-06-05 06:48:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 3.4463582677165356) internal successors, (7003), 2032 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7003 transitions. [2021-06-05 06:48:01,402 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7003 transitions. Word has length 26 [2021-06-05 06:48:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:01,402 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 7003 transitions. [2021-06-05 06:48:01,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7003 transitions. [2021-06-05 06:48:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:01,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:01,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:01,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:01,605 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash 134504147, now seen corresponding path program 27 times [2021-06-05 06:48:01,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:01,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367779793] [2021-06-05 06:48:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:01,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:01,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367779793] [2021-06-05 06:48:01,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367779793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:01,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803045204] [2021-06-05 06:48:01,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:01,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:48:01,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:48:01,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:02,392 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:48:02,599 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-05 06:48:02,777 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:48:02,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:48:02,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:02,800 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:48:02,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:48:02,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,136 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2021-06-05 06:48:03,137 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-06-05 06:48:03,156 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:48:03,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:48:03,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,312 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-05 06:48:03,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:48:03,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,345 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:48:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:48:03,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,480 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 06:48:03,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,498 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:48:03,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:48:03,500 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,633 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-05 06:48:03,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,652 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:48:03,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:48:03,655 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,787 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-06-05 06:48:03,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,807 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:48:03,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 06:48:03,810 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,933 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:48:03,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:03,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:48:03,953 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:03,962 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:48:03,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:48:03,963 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:04,168 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2021-06-05 06:48:04,169 INFO L628 ElimStorePlain]: treesize reduction 25, result has 91.7 percent of original size [2021-06-05 06:48:04,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:04,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:48:04,185 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:04,295 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 06:48:04,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:04,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:48:04,308 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:563, output treesize:360 [2021-06-05 06:48:04,466 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2021-06-05 06:48:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:04,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803045204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:04,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:04,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 06:48:04,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156181345] [2021-06-05 06:48:04,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:48:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:48:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:48:04,514 INFO L87 Difference]: Start difference. First operand 2033 states and 7003 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:05,346 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-06-05 06:48:05,779 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 06:48:05,995 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 06:48:06,187 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 06:48:06,742 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 06:48:07,246 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 87 [2021-06-05 06:48:07,745 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2021-06-05 06:48:08,317 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-06-05 06:48:09,002 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 109 [2021-06-05 06:48:09,539 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 90 [2021-06-05 06:48:09,790 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 73 [2021-06-05 06:48:10,720 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 112 [2021-06-05 06:48:11,205 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 76 [2021-06-05 06:48:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:11,375 INFO L93 Difference]: Finished difference Result 2749 states and 9119 transitions. [2021-06-05 06:48:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:48:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:11,378 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 06:48:11,379 INFO L226 Difference]: Without dead ends: 2719 [2021-06-05 06:48:11,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 6875.9ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:48:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2021-06-05 06:48:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2036. [2021-06-05 06:48:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 3.444226044226044) internal successors, (7009), 2035 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 7009 transitions. [2021-06-05 06:48:11,403 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 7009 transitions. Word has length 26 [2021-06-05 06:48:11,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:11,403 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 7009 transitions. [2021-06-05 06:48:11,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 7009 transitions. [2021-06-05 06:48:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:11,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:11,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:11,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1981 [2021-06-05 06:48:11,606 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1483028633, now seen corresponding path program 28 times [2021-06-05 06:48:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:11,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960776883] [2021-06-05 06:48:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:12,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:12,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960776883] [2021-06-05 06:48:12,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960776883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:12,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892929061] [2021-06-05 06:48:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:12,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:48:12,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:48:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:12,409 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:48:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:12,513 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:48:12,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:48:12,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:12,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:12,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:12,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 06:48:12,528 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:12,813 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-06-05 06:48:12,814 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-06-05 06:48:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:12,826 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:48:12,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:12,958 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 06:48:12,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:12,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:12,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:48:12,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,098 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-05 06:48:13,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:13,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:48:13,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,235 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 06:48:13,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:48:13,251 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,260 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:48:13,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:48:13,261 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,362 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-05 06:48:13,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:48:13,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:48:13,398 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,558 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-06-05 06:48:13,558 INFO L628 ElimStorePlain]: treesize reduction 20, result has 91.7 percent of original size [2021-06-05 06:48:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:48:13,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:13,654 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:13,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:48:13,655 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:13,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:13,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:48:13,728 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-06-05 06:48:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:13,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892929061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:13,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:13,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:48:13,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348537793] [2021-06-05 06:48:13,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:48:13,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:48:13,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:48:13,864 INFO L87 Difference]: Start difference. First operand 2036 states and 7009 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:15,145 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:48:15,320 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:48:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:15,668 INFO L93 Difference]: Finished difference Result 2932 states and 9765 transitions. [2021-06-05 06:48:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:48:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:15,672 INFO L225 Difference]: With dead ends: 2932 [2021-06-05 06:48:15,672 INFO L226 Difference]: Without dead ends: 2898 [2021-06-05 06:48:15,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1950.3ms TimeCoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:48:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-06-05 06:48:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2045. [2021-06-05 06:48:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-06-05 06:48:15,699 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-06-05 06:48:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:15,699 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-06-05 06:48:15,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-06-05 06:48:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:15,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:15,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:15,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2017,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:15,902 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:15,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:15,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 29 times [2021-06-05 06:48:15,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:15,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609116459] [2021-06-05 06:48:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:16,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:16,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609116459] [2021-06-05 06:48:16,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609116459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:16,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177706186] [2021-06-05 06:48:16,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:16,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:48:16,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:48:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:16,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:16,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:16,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:48:16,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:16,641 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:16,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2021-06-05 06:48:16,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:16,922 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-06-05 06:48:16,922 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.4 percent of original size [2021-06-05 06:48:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:16,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:16,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:48:16,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:16,949 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:48:16,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,084 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 06:48:17,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:17,097 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:48:17,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:17,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:48:17,108 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,224 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-05 06:48:17,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:17,235 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:17,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:48:17,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:17,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:48:17,248 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,354 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 06:48:17,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:17,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:48:17,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:17,378 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:48:17,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:48:17,379 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:17,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:17,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:48:17,475 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:407, output treesize:176 [2021-06-05 06:48:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177706186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:17,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:48:17,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370426571] [2021-06-05 06:48:17,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:48:17,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:48:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:48:17,598 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:18,479 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 06:48:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:18,893 INFO L93 Difference]: Finished difference Result 2657 states and 8964 transitions. [2021-06-05 06:48:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:48:18,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:18,897 INFO L225 Difference]: With dead ends: 2657 [2021-06-05 06:48:18,897 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 06:48:18,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1368.8ms TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:48:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 06:48:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2045. [2021-06-05 06:48:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.4486301369863015) internal successors, (7049), 2044 states have internal predecessors, (7049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7049 transitions. [2021-06-05 06:48:18,922 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7049 transitions. Word has length 26 [2021-06-05 06:48:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:18,922 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7049 transitions. [2021-06-05 06:48:18,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7049 transitions. [2021-06-05 06:48:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:18,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:18,925 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:19,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-05 06:48:19,125 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:19,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:19,125 INFO L82 PathProgramCache]: Analyzing trace with hash 568891871, now seen corresponding path program 48 times [2021-06-05 06:48:19,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:19,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145799638] [2021-06-05 06:48:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:19,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:19,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145799638] [2021-06-05 06:48:19,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145799638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:19,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075675314] [2021-06-05 06:48:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:19,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:48:19,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:48:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-06-05 06:48:19,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-05 06:48:19,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-05 06:48:19,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 06:48:19,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-05 06:48:19,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:48:19,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:19,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-05 06:48:19,996 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:19,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-06-05 06:48:20,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:48:20,010 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 06:48:20,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:48:20,024 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 16 [2021-06-05 06:48:20,031 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-06-05 06:48:20,038 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:48:20,044 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:20,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:48:20,048 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:20,065 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 06:48:20,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:48:20,066 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:683, output treesize:15 [2021-06-05 06:48:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:20,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075675314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:20,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:20,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:48:20,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978381506] [2021-06-05 06:48:20,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:48:20,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:20,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:48:20,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:48:20,092 INFO L87 Difference]: Start difference. First operand 2045 states and 7049 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:21,319 INFO L93 Difference]: Finished difference Result 2543 states and 8526 transitions. [2021-06-05 06:48:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:48:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:21,323 INFO L225 Difference]: With dead ends: 2543 [2021-06-05 06:48:21,323 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 06:48:21,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1305.6ms TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:48:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 06:48:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2041. [2021-06-05 06:48:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-06-05 06:48:21,348 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-06-05 06:48:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:21,348 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-06-05 06:48:21,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-06-05 06:48:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:21,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:21,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:21,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2081 [2021-06-05 06:48:21,551 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:21,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:21,551 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-05 06:48:21,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:21,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368037359] [2021-06-05 06:48:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:21,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368037359] [2021-06-05 06:48:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368037359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833818453] [2021-06-05 06:48:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:21,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:48:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:22,245 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_230, v_prenex_232], 5=[v_prenex_228, A]} [2021-06-05 06:48:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:48:22,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:22,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:48:22,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:22,343 INFO L628 ElimStorePlain]: treesize reduction 143, result has 43.7 percent of original size [2021-06-05 06:48:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:48:22,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:22,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:22,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:48:22,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:22,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:22,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:22,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:48:22,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:22,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:22,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:48:22,430 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:307, output treesize:27 [2021-06-05 06:48:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833818453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:22,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:48:22,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701815991] [2021-06-05 06:48:22,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:48:22,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:48:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:48:22,465 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:24,538 INFO L93 Difference]: Finished difference Result 2757 states and 9218 transitions. [2021-06-05 06:48:24,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:48:24,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:24,542 INFO L225 Difference]: With dead ends: 2757 [2021-06-05 06:48:24,542 INFO L226 Difference]: Without dead ends: 2742 [2021-06-05 06:48:24,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1993.1ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:48:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-06-05 06:48:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2041. [2021-06-05 06:48:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 3.4475490196078433) internal successors, (7033), 2040 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 7033 transitions. [2021-06-05 06:48:24,567 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 7033 transitions. Word has length 26 [2021-06-05 06:48:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:24,567 INFO L482 AbstractCegarLoop]: Abstraction has 2041 states and 7033 transitions. [2021-06-05 06:48:24,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 7033 transitions. [2021-06-05 06:48:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:24,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:24,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:24,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:24,770 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1306035039, now seen corresponding path program 50 times [2021-06-05 06:48:24,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:24,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601390167] [2021-06-05 06:48:24,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:24,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:24,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601390167] [2021-06-05 06:48:24,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601390167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:24,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773733939] [2021-06-05 06:48:24,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:25,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:48:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:48:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,216 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:48:25,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:48:25,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:25,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:48:25,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:25,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 06:48:25,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:25,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:48:25,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,323 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:48:25,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:48:25,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,340 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:25,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,368 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:48:25,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 06:48:25,369 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,384 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:25,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,399 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:48:25,399 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,415 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:25,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,432 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:25,433 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,446 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:48:25,447 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,462 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:48:25,463 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,483 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:48:25,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:48:25,485 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,505 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:48:25,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:48:25,506 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:25,514 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:25,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:48:25,515 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:25,579 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-06-05 06:48:25,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:48:25,580 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-05 06:48:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:25,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773733939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:25,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:25,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-05 06:48:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217694843] [2021-06-05 06:48:25,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:48:25,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:48:25,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:48:25,664 INFO L87 Difference]: Start difference. First operand 2041 states and 7033 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:26,267 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-05 06:48:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:28,869 INFO L93 Difference]: Finished difference Result 3704 states and 11942 transitions. [2021-06-05 06:48:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:48:28,870 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:28,875 INFO L225 Difference]: With dead ends: 3704 [2021-06-05 06:48:28,875 INFO L226 Difference]: Without dead ends: 3647 [2021-06-05 06:48:28,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 2866.9ms TimeCoverageRelationStatistics Valid=843, Invalid=3579, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:48:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-05 06:48:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2063. [2021-06-05 06:48:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2063 states, 2062 states have (on average 3.4393792434529584) internal successors, (7092), 2062 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 7092 transitions. [2021-06-05 06:48:28,907 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 7092 transitions. Word has length 26 [2021-06-05 06:48:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:28,907 INFO L482 AbstractCegarLoop]: Abstraction has 2063 states and 7092 transitions. [2021-06-05 06:48:28,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 7092 transitions. [2021-06-05 06:48:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:28,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:28,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:29,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:29,113 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-05 06:48:29,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:29,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179503063] [2021-06-05 06:48:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:29,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:29,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179503063] [2021-06-05 06:48:29,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179503063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:29,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489017618] [2021-06-05 06:48:29,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:29,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:48:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:48:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:29,717 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 06:48:29,951 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:48:29,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 06:48:29,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:29,997 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 06:48:29,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2021-06-05 06:48:29,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:30,442 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-05 06:48:30,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:30,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:30,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-05 06:48:30,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:30,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 59 [2021-06-05 06:48:30,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:31,459 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 168 [2021-06-05 06:48:31,460 INFO L628 ElimStorePlain]: treesize reduction 114, result has 87.7 percent of original size [2021-06-05 06:48:31,511 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:48:31,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 48 [2021-06-05 06:48:31,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:31,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:31,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-05 06:48:31,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:31,973 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-05 06:48:31,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:32,030 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:48:32,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-05 06:48:32,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:32,082 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:48:32,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-05 06:48:32,089 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:32,896 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 151 [2021-06-05 06:48:32,896 INFO L628 ElimStorePlain]: treesize reduction 37, result has 95.3 percent of original size [2021-06-05 06:48:32,945 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:48:32,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 47 [2021-06-05 06:48:32,948 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:32,988 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:48:32,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:48:32,993 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:33,378 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 06:48:33,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:33,421 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:48:33,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 40 [2021-06-05 06:48:33,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:33,466 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:48:33,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-05 06:48:33,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:34,185 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-05 06:48:34,186 INFO L628 ElimStorePlain]: treesize reduction 45, result has 93.8 percent of original size [2021-06-05 06:48:34,233 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:48:34,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 47 [2021-06-05 06:48:34,236 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:34,278 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:48:34,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 51 [2021-06-05 06:48:34,283 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:34,952 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 130 [2021-06-05 06:48:34,952 INFO L628 ElimStorePlain]: treesize reduction 24, result has 96.5 percent of original size [2021-06-05 06:48:35,001 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:48:35,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-05 06:48:35,010 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:35,053 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:48:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-05 06:48:35,061 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:36,079 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 141 DAG size of output: 135 [2021-06-05 06:48:36,079 INFO L628 ElimStorePlain]: treesize reduction 50, result has 93.1 percent of original size [2021-06-05 06:48:36,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 15 xjuncts. [2021-06-05 06:48:36,124 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:833, output treesize:1677 [2021-06-05 06:48:36,591 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-06-05 06:48:36,827 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-06-05 06:48:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:36,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489017618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:36,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:36,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:48:36,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521629077] [2021-06-05 06:48:36,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:48:36,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:48:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:48:36,950 INFO L87 Difference]: Start difference. First operand 2063 states and 7092 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:37,433 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 41 [2021-06-05 06:48:38,047 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 06:48:38,719 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-06-05 06:48:38,987 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-05 06:48:39,359 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2021-06-05 06:48:39,767 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-06-05 06:48:39,946 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-06-05 06:48:40,096 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2021-06-05 06:48:40,528 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-05 06:48:41,244 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-06-05 06:48:41,437 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2021-06-05 06:48:41,709 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-05 06:48:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:42,198 INFO L93 Difference]: Finished difference Result 3467 states and 11274 transitions. [2021-06-05 06:48:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:48:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:42,203 INFO L225 Difference]: With dead ends: 3467 [2021-06-05 06:48:42,203 INFO L226 Difference]: Without dead ends: 3422 [2021-06-05 06:48:42,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 5585.1ms TimeCoverageRelationStatistics Valid=789, Invalid=3633, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:48:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-05 06:48:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 2089. [2021-06-05 06:48:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 3.4454022988505746) internal successors, (7194), 2088 states have internal predecessors, (7194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 7194 transitions. [2021-06-05 06:48:42,234 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 7194 transitions. Word has length 26 [2021-06-05 06:48:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:42,234 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 7194 transitions. [2021-06-05 06:48:42,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 7194 transitions. [2021-06-05 06:48:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:42,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:42,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:42,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:42,437 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-05 06:48:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709254991] [2021-06-05 06:48:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:42,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709254991] [2021-06-05 06:48:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709254991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570767537] [2021-06-05 06:48:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:42,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:48:42,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:42,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:48:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:43,157 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_258], 5=[v_prenex_254, v_prenex_256]} [2021-06-05 06:48:43,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:43,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:43,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:43,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 06:48:43,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:48:43,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:43,234 INFO L628 ElimStorePlain]: treesize reduction 130, result has 39.0 percent of original size [2021-06-05 06:48:43,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-06-05 06:48:43,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:43,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 06:48:43,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:43,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:48:43,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:48:43,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:43,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:43,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:48:43,281 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-06-05 06:48:43,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:43,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570767537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:43,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:43,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:48:43,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150672350] [2021-06-05 06:48:43,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:48:43,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:48:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:48:43,315 INFO L87 Difference]: Start difference. First operand 2089 states and 7194 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:45,262 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2021-06-05 06:48:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:45,504 INFO L93 Difference]: Finished difference Result 2641 states and 8863 transitions. [2021-06-05 06:48:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:48:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:45,508 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 06:48:45,508 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 06:48:45,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 2032.0ms TimeCoverageRelationStatistics Valid=362, Invalid=1800, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:48:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 06:48:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2087. [2021-06-05 06:48:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-06-05 06:48:45,532 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-06-05 06:48:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:45,532 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-06-05 06:48:45,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-06-05 06:48:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:45,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:45,534 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:45,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2346,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:45,735 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:45,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-05 06:48:45,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:45,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404129762] [2021-06-05 06:48:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:45,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:45,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404129762] [2021-06-05 06:48:45,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404129762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:45,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618655725] [2021-06-05 06:48:45,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:46,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:48:46,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:46,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:48:46,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:46,667 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-06-05 06:48:46,887 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:48:47,068 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_270, v_prenex_271, v_prenex_273, v_prenex_267, v_prenex_268], 6=[v_prenex_272, v_prenex_269]} [2021-06-05 06:48:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,101 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:48:47,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 06:48:47,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,132 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:48:47,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:48:47,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:47,789 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2021-06-05 06:48:47,789 INFO L628 ElimStorePlain]: treesize reduction 31, result has 96.1 percent of original size [2021-06-05 06:48:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,824 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:48:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:48:47,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:47,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:47,850 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:48:47,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-05 06:48:47,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:48,171 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-05 06:48:48,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:48,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:48:48,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:48,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:48,235 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:48:48,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 06:48:48,238 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:49,093 WARN L205 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 142 [2021-06-05 06:48:49,094 INFO L628 ElimStorePlain]: treesize reduction 46, result has 93.5 percent of original size [2021-06-05 06:48:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,125 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:48:49,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-06-05 06:48:49,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,151 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:48:49,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 06:48:49,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:49,424 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:48:49,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,461 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:48:49,461 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 33 treesize of output 43 [2021-06-05 06:48:49,464 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:49,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,488 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:48:49,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 06:48:49,491 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:49,744 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 06:48:49,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,775 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:48:49,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-06-05 06:48:49,776 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:49,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:49,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 06:48:49,807 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:50,272 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2021-06-05 06:48:50,273 INFO L628 ElimStorePlain]: treesize reduction 35, result has 93.7 percent of original size [2021-06-05 06:48:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,298 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-05 06:48:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 30 [2021-06-05 06:48:50,300 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,322 INFO L354 Elim1Store]: treesize reduction 14, result has 57.6 percent of original size [2021-06-05 06:48:50,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-06-05 06:48:50,326 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:50,696 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 109 [2021-06-05 06:48:50,696 INFO L628 ElimStorePlain]: treesize reduction 41, result has 91.5 percent of original size [2021-06-05 06:48:50,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:50,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 45 [2021-06-05 06:48:50,727 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:50,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:50,746 INFO L354 Elim1Store]: treesize reduction 18, result has 45.5 percent of original size [2021-06-05 06:48:50,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-06-05 06:48:50,748 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:50,916 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 06:48:50,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:50,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 06:48:50,929 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:829, output treesize:384 [2021-06-05 06:48:51,111 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 27 [2021-06-05 06:48:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:51,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618655725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:51,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:51,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 06:48:51,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508437542] [2021-06-05 06:48:51,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:48:51,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:48:51,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:48:51,149 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:55,221 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 06:48:56,302 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-05 06:48:56,999 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 170 [2021-06-05 06:48:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:48:57,582 INFO L93 Difference]: Finished difference Result 3018 states and 10044 transitions. [2021-06-05 06:48:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:48:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:48:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:48:57,586 INFO L225 Difference]: With dead ends: 3018 [2021-06-05 06:48:57,586 INFO L226 Difference]: Without dead ends: 2988 [2021-06-05 06:48:57,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 6726.7ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:48:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-05 06:48:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2087. [2021-06-05 06:48:57,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.4453499520613615) internal successors, (7187), 2086 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 7187 transitions. [2021-06-05 06:48:57,616 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 7187 transitions. Word has length 26 [2021-06-05 06:48:57,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:48:57,616 INFO L482 AbstractCegarLoop]: Abstraction has 2087 states and 7187 transitions. [2021-06-05 06:48:57,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:48:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 7187 transitions. [2021-06-05 06:48:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:48:57,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:48:57,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:48:57,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:57,819 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:48:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:48:57,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-05 06:48:57,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:48:57,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081556985] [2021-06-05 06:48:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:48:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:48:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:58,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:48:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081556985] [2021-06-05 06:48:58,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081556985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:58,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555671257] [2021-06-05 06:48:58,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:48:58,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:48:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:48:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:48:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:48:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,325 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:48:58,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:48:58,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:48:58,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:58,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 06:48:58,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:48:58,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:48:58,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,453 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:48:58,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 06:48:58,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,469 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:58,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,492 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:48:58,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 06:48:58,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,517 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:58,518 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,536 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:48:58,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,556 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:58,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,572 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:48:58,573 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,588 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:48:58,589 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,602 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:48:58,603 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,624 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:48:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:48:58,625 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,664 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:48:58,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:48:58,666 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:48:58,676 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:48:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:48:58,677 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:48:58,760 INFO L628 ElimStorePlain]: treesize reduction 126, result has 35.4 percent of original size [2021-06-05 06:48:58,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:48:58,762 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-05 06:48:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:48:58,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555671257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:48:58,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:48:58,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:48:58,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790795047] [2021-06-05 06:48:58,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:48:58,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:48:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:48:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:48:58,852 INFO L87 Difference]: Start difference. First operand 2087 states and 7187 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:01,182 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-05 06:49:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:01,668 INFO L93 Difference]: Finished difference Result 3534 states and 11458 transitions. [2021-06-05 06:49:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:49:01,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:01,674 INFO L225 Difference]: With dead ends: 3534 [2021-06-05 06:49:01,674 INFO L226 Difference]: Without dead ends: 3500 [2021-06-05 06:49:01,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2702.8ms TimeCoverageRelationStatistics Valid=658, Invalid=2534, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:49:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-06-05 06:49:01,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2096. [2021-06-05 06:49:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.4520286396181383) internal successors, (7232), 2095 states have internal predecessors, (7232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7232 transitions. [2021-06-05 06:49:01,721 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7232 transitions. Word has length 26 [2021-06-05 06:49:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:01,721 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7232 transitions. [2021-06-05 06:49:01,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7232 transitions. [2021-06-05 06:49:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:01,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:01,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:01,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2429,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:01,946 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:01,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:01,947 INFO L82 PathProgramCache]: Analyzing trace with hash -505799277, now seen corresponding path program 30 times [2021-06-05 06:49:01,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:01,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029819257] [2021-06-05 06:49:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:02,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:02,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029819257] [2021-06-05 06:49:02,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029819257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:02,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647891830] [2021-06-05 06:49:02,094 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:02,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:49:02,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:49:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:02,483 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:02,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:49:02,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,504 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:02,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:49:02,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,522 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:02,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:49:02,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,532 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:02,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:02,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:49:02,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,560 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:02,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,570 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:02,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,589 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:02,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:49:02,593 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,602 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:02,603 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,612 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:02,613 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,630 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-05 06:49:02,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 23 [2021-06-05 06:49:02,631 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,640 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:02,641 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,649 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:02,650 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,659 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:02,660 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,669 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:02,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:49:02,670 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,678 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-05 06:49:02,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 19 [2021-06-05 06:49:02,680 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:02,855 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-06-05 06:49:02,856 INFO L628 ElimStorePlain]: treesize reduction 43, result has 79.1 percent of original size [2021-06-05 06:49:02,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:49:02,858 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:729, output treesize:157 [2021-06-05 06:49:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647891830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:02,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 06:49:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515742946] [2021-06-05 06:49:02,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:49:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:02,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:49:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:49:02,990 INFO L87 Difference]: Start difference. First operand 2096 states and 7232 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:04,501 INFO L93 Difference]: Finished difference Result 2796 states and 9280 transitions. [2021-06-05 06:49:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:49:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:04,505 INFO L225 Difference]: With dead ends: 2796 [2021-06-05 06:49:04,505 INFO L226 Difference]: Without dead ends: 2751 [2021-06-05 06:49:04,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1441.1ms TimeCoverageRelationStatistics Valid=241, Invalid=1481, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:49:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-05 06:49:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2123. [2021-06-05 06:49:04,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.4542884071630535) internal successors, (7330), 2122 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:04,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7330 transitions. [2021-06-05 06:49:04,533 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7330 transitions. Word has length 26 [2021-06-05 06:49:04,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:04,533 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 7330 transitions. [2021-06-05 06:49:04,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:04,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7330 transitions. [2021-06-05 06:49:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:04,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:04,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:04,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2464 [2021-06-05 06:49:04,736 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash 266862281, now seen corresponding path program 31 times [2021-06-05 06:49:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:04,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078902193] [2021-06-05 06:49:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:05,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:05,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078902193] [2021-06-05 06:49:05,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078902193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:05,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951261852] [2021-06-05 06:49:05,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:49:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:05,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 06:49:05,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:05,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-05 06:49:05,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,276 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:05,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 06:49:05,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:05,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 06:49:05,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:49:05,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,312 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:49:05,313 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,323 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:49:05,324 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,333 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:49:05,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,344 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:49:05,344 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,353 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 06:49:05,354 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,362 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:49:05,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,371 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-05 06:49:05,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 06:49:05,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,392 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 06:49:05,393 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,404 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:05,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-06-05 06:49:05,405 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:05,411 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:05,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:49:05,412 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:05,522 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-06-05 06:49:05,523 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-06-05 06:49:05,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:49:05,523 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-06-05 06:49:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:05,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951261852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:05,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:05,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:49:05,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619889653] [2021-06-05 06:49:05,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:05,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:05,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:05,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:05,603 INFO L87 Difference]: Start difference. First operand 2123 states and 7330 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:06,805 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 06:49:07,184 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 06:49:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:07,341 INFO L93 Difference]: Finished difference Result 2903 states and 9622 transitions. [2021-06-05 06:49:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:49:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:07,345 INFO L225 Difference]: With dead ends: 2903 [2021-06-05 06:49:07,345 INFO L226 Difference]: Without dead ends: 2858 [2021-06-05 06:49:07,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1699.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:49:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-05 06:49:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2119. [2021-06-05 06:49:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.453257790368272) internal successors, (7314), 2118 states have internal predecessors, (7314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7314 transitions. [2021-06-05 06:49:07,373 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7314 transitions. Word has length 26 [2021-06-05 06:49:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:07,373 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7314 transitions. [2021-06-05 06:49:07,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7314 transitions. [2021-06-05 06:49:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:07,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:07,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:07,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2512,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:07,576 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:07,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -176639705, now seen corresponding path program 32 times [2021-06-05 06:49:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:07,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321017943] [2021-06-05 06:49:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:07,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:07,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321017943] [2021-06-05 06:49:07,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321017943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:07,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173818348] [2021-06-05 06:49:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:07,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:49:07,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:07,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:07,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:08,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:08,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:08,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:08,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:08,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:49:08,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:08,319 INFO L628 ElimStorePlain]: treesize reduction 117, result has 42.9 percent of original size [2021-06-05 06:49:08,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:08,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:08,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:49:08,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:08,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:08,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:08,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:08,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:08,375 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-06-05 06:49:08,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:49:08,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-06-05 06:49:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:08,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173818348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:08,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:08,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:49:08,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425191834] [2021-06-05 06:49:08,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:49:08,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:08,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:49:08,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:49:08,406 INFO L87 Difference]: Start difference. First operand 2119 states and 7314 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:09,386 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-05 06:49:09,538 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 06:49:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:09,631 INFO L93 Difference]: Finished difference Result 2789 states and 9380 transitions. [2021-06-05 06:49:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:49:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:09,635 INFO L225 Difference]: With dead ends: 2789 [2021-06-05 06:49:09,635 INFO L226 Difference]: Without dead ends: 2774 [2021-06-05 06:49:09,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1291.8ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:49:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2021-06-05 06:49:09,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2117. [2021-06-05 06:49:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 3.452741020793951) internal successors, (7306), 2116 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 7306 transitions. [2021-06-05 06:49:09,662 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 7306 transitions. Word has length 26 [2021-06-05 06:49:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:09,662 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 7306 transitions. [2021-06-05 06:49:09,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 7306 transitions. [2021-06-05 06:49:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:09,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:09,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:09,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2531 [2021-06-05 06:49:09,869 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 33 times [2021-06-05 06:49:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:09,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519718935] [2021-06-05 06:49:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:10,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:10,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519718935] [2021-06-05 06:49:10,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519718935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:10,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783025282] [2021-06-05 06:49:10,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:10,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:49:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:49:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:10,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:10,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:10,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:49:10,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:10,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,501 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:10,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,509 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:10,510 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:10,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:10,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,534 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:10,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:10,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,543 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:10,544 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:10,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,563 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:10,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:49:10,564 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,575 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:10,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:49:10,576 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,586 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:10,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-05 06:49:10,587 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,595 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:10,596 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,603 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:49:10,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,611 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:10,612 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:10,616 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:10,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:10,617 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:10,692 INFO L628 ElimStorePlain]: treesize reduction 44, result has 67.9 percent of original size [2021-06-05 06:49:10,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:49:10,694 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:617, output treesize:75 [2021-06-05 06:49:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:10,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783025282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:10,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:10,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:49:10,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712183894] [2021-06-05 06:49:10,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:10,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:10,769 INFO L87 Difference]: Start difference. First operand 2117 states and 7306 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:11,211 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 06:49:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:11,727 INFO L93 Difference]: Finished difference Result 2583 states and 8714 transitions. [2021-06-05 06:49:11,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:49:11,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:11,731 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 06:49:11,731 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 06:49:11,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:49:11,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 06:49:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2111. [2021-06-05 06:49:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 3.4526066350710902) internal successors, (7285), 2110 states have internal predecessors, (7285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 7285 transitions. [2021-06-05 06:49:11,762 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 7285 transitions. Word has length 26 [2021-06-05 06:49:11,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:11,762 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 7285 transitions. [2021-06-05 06:49:11,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 7285 transitions. [2021-06-05 06:49:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:11,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:11,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:11,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-05 06:49:11,988 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash -129711505, now seen corresponding path program 34 times [2021-06-05 06:49:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:11,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932119623] [2021-06-05 06:49:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:12,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:12,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932119623] [2021-06-05 06:49:12,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932119623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:12,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534319067] [2021-06-05 06:49:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:12,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:49:12,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:12,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:12,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:12,801 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:12,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 06:49:12,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:12,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:12,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:49:12,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,162 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-06-05 06:49:13,162 INFO L628 ElimStorePlain]: treesize reduction 29, result has 93.3 percent of original size [2021-06-05 06:49:13,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,184 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:13,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:49:13,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,208 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:13,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:49:13,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,368 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-05 06:49:13,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:13,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:49:13,392 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,409 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:13,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:49:13,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,699 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-05 06:49:13,699 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.5 percent of original size [2021-06-05 06:49:13,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:13,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:49:13,719 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,735 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:13,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:49:13,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,887 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 06:49:13,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:13,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:13,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:49:13,908 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:13,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:13,923 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:13,924 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:14,164 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-06-05 06:49:14,165 INFO L628 ElimStorePlain]: treesize reduction 16, result has 94.8 percent of original size [2021-06-05 06:49:14,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:49:14,180 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 11 variables, input treesize:457, output treesize:259 [2021-06-05 06:49:14,346 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-06-05 06:49:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:14,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534319067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:14,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:14,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:49:14,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193193137] [2021-06-05 06:49:14,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:49:14,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:49:14,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:49:14,381 INFO L87 Difference]: Start difference. First operand 2111 states and 7285 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:14,588 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-06-05 06:49:14,866 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 06:49:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:15,260 INFO L93 Difference]: Finished difference Result 2792 states and 9404 transitions. [2021-06-05 06:49:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:49:15,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:15,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:15,264 INFO L225 Difference]: With dead ends: 2792 [2021-06-05 06:49:15,264 INFO L226 Difference]: Without dead ends: 2767 [2021-06-05 06:49:15,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1277.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:49:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-06-05 06:49:15,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2092. [2021-06-05 06:49:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-06-05 06:49:15,289 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-06-05 06:49:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:15,289 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-06-05 06:49:15,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:15,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-06-05 06:49:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:15,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:15,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:15,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2598,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:15,492 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 35 times [2021-06-05 06:49:15,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:15,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590195827] [2021-06-05 06:49:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:15,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590195827] [2021-06-05 06:49:15,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590195827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:15,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691665928] [2021-06-05 06:49:15,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:15,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:49:15,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:15,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:15,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:15,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:15,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:15,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:15,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:49:15,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:49:15,989 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:15,995 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:15,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:49:16,001 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:16,006 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:16,011 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:16,017 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:16,022 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-06-05 06:49:16,028 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:49:16,032 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:16,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:16,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:16,035 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:16,053 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:49:16,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:49:16,054 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-06-05 06:49:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:16,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691665928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:16,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:16,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:49:16,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465760163] [2021-06-05 06:49:16,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:16,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:16,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:16,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:16,077 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:16,807 INFO L93 Difference]: Finished difference Result 2658 states and 8951 transitions. [2021-06-05 06:49:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:49:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:16,811 INFO L225 Difference]: With dead ends: 2658 [2021-06-05 06:49:16,811 INFO L226 Difference]: Without dead ends: 2643 [2021-06-05 06:49:16,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:49:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-05 06:49:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2095. [2021-06-05 06:49:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.451289398280802) internal successors, (7227), 2094 states have internal predecessors, (7227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:16,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 7227 transitions. [2021-06-05 06:49:16,836 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 7227 transitions. Word has length 26 [2021-06-05 06:49:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:16,836 INFO L482 AbstractCegarLoop]: Abstraction has 2095 states and 7227 transitions. [2021-06-05 06:49:16,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 7227 transitions. [2021-06-05 06:49:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:16,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:16,839 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:17,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2671,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:17,039 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash 987336491, now seen corresponding path program 36 times [2021-06-05 06:49:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:17,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886636645] [2021-06-05 06:49:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:17,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:17,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886636645] [2021-06-05 06:49:17,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886636645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:17,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678733326] [2021-06-05 06:49:17,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:17,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:49:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:49:17,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:17,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,423 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:17,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,431 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:17,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,442 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:17,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:17,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,450 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:17,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,461 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:17,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:17,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:17,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:17,473 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,481 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:17,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,492 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:49:17,493 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:49:17,504 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,511 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:17,512 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,520 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:49:17,521 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,528 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:17,529 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,536 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:17,537 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,544 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:17,544 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,552 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:17,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:17,552 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:17,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:17,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:49:17,562 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:17,621 INFO L628 ElimStorePlain]: treesize reduction 55, result has 55.6 percent of original size [2021-06-05 06:49:17,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:49:17,622 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:569, output treesize:69 [2021-06-05 06:49:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:17,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678733326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:17,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:17,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:49:17,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411181469] [2021-06-05 06:49:17,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:17,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:17,704 INFO L87 Difference]: Start difference. First operand 2095 states and 7227 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:18,600 INFO L93 Difference]: Finished difference Result 2926 states and 9825 transitions. [2021-06-05 06:49:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:49:18,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:18,604 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 06:49:18,604 INFO L226 Difference]: Without dead ends: 2911 [2021-06-05 06:49:18,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:49:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-05 06:49:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2092. [2021-06-05 06:49:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.4490674318507892) internal successors, (7212), 2091 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 7212 transitions. [2021-06-05 06:49:18,632 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 7212 transitions. Word has length 26 [2021-06-05 06:49:18,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:18,632 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 7212 transitions. [2021-06-05 06:49:18,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:18,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 7212 transitions. [2021-06-05 06:49:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:18,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:18,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:18,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:18,835 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 37 times [2021-06-05 06:49:18,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:18,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029019736] [2021-06-05 06:49:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:18,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:18,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029019736] [2021-06-05 06:49:18,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029019736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988398548] [2021-06-05 06:49:18,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:18,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:18,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:19,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:19,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:19,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:19,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:19,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-06-05 06:49:19,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:19,292 INFO L628 ElimStorePlain]: treesize reduction 108, result has 41.6 percent of original size [2021-06-05 06:49:19,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-06-05 06:49:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:19,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:19,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:49:19,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:19,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:19,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:19,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:19,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:19,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:49:19,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:31 [2021-06-05 06:49:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:19,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988398548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:19,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:19,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:49:19,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78999142] [2021-06-05 06:49:19,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:19,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:19,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:19,375 INFO L87 Difference]: Start difference. First operand 2092 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:19,836 INFO L93 Difference]: Finished difference Result 2732 states and 9177 transitions. [2021-06-05 06:49:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:49:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:19,839 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 06:49:19,839 INFO L226 Difference]: Without dead ends: 2702 [2021-06-05 06:49:19,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:49:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2021-06-05 06:49:19,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 2096. [2021-06-05 06:49:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.452505966587112) internal successors, (7233), 2095 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 7233 transitions. [2021-06-05 06:49:19,866 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 7233 transitions. Word has length 26 [2021-06-05 06:49:19,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:19,866 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 7233 transitions. [2021-06-05 06:49:19,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 7233 transitions. [2021-06-05 06:49:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:19,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:19,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:20,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2729 [2021-06-05 06:49:20,091 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:20,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:20,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 38 times [2021-06-05 06:49:20,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:20,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599350824] [2021-06-05 06:49:20,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599350824] [2021-06-05 06:49:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599350824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013604746] [2021-06-05 06:49:20,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:20,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:49:20,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:20,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:20,661 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:20,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:49:20,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:20,682 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:20,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:49:20,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:20,815 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:49:20,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:20,835 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:20,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:49:20,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:20,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:49:20,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:20,971 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 06:49:20,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:20,992 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:20,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:49:20,995 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:21,013 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:21,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:49:21,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:21,138 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:49:21,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:21,157 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:21,158 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:21,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:21,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:21,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:49:21,175 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:21,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:21,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:49:21,284 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:241 [2021-06-05 06:49:21,455 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-06-05 06:49:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:21,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013604746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:21,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:21,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:49:21,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103563318] [2021-06-05 06:49:21,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:21,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:21,489 INFO L87 Difference]: Start difference. First operand 2096 states and 7233 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:21,881 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-05 06:49:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:22,232 INFO L93 Difference]: Finished difference Result 2726 states and 9219 transitions. [2021-06-05 06:49:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:49:22,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:22,235 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 06:49:22,235 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 06:49:22,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 904.2ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:49:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 06:49:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2120. [2021-06-05 06:49:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.4502123643227938) internal successors, (7311), 2119 states have internal predecessors, (7311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7311 transitions. [2021-06-05 06:49:22,260 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7311 transitions. Word has length 26 [2021-06-05 06:49:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:22,260 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7311 transitions. [2021-06-05 06:49:22,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7311 transitions. [2021-06-05 06:49:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:22,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:22,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:22,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2743 [2021-06-05 06:49:22,463 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:22,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:22,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 39 times [2021-06-05 06:49:22,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:22,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993425348] [2021-06-05 06:49:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:22,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:22,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993425348] [2021-06-05 06:49:22,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993425348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:22,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387651339] [2021-06-05 06:49:22,727 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:22,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:49:22,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:49:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:23,103 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-06-05 06:49:23,321 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_312, v_prenex_313]} [2021-06-05 06:49:23,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:23,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:49:23,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:23,389 INFO L628 ElimStorePlain]: treesize reduction 86, result has 47.9 percent of original size [2021-06-05 06:49:23,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:23,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:23,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:23,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:23,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:23,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:23,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:23,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:49:23,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:179, output treesize:22 [2021-06-05 06:49:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:23,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387651339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:23,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:23,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:49:23,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314878009] [2021-06-05 06:49:23,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:49:23,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:23,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:49:23,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:49:23,472 INFO L87 Difference]: Start difference. First operand 2120 states and 7311 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:24,142 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 06:49:24,337 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-05 06:49:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:24,486 INFO L93 Difference]: Finished difference Result 2785 states and 9315 transitions. [2021-06-05 06:49:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:49:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:24,490 INFO L225 Difference]: With dead ends: 2785 [2021-06-05 06:49:24,490 INFO L226 Difference]: Without dead ends: 2740 [2021-06-05 06:49:24,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1309.6ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:49:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-05 06:49:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 2156. [2021-06-05 06:49:24,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.451508120649652) internal successors, (7438), 2155 states have internal predecessors, (7438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7438 transitions. [2021-06-05 06:49:24,516 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7438 transitions. Word has length 26 [2021-06-05 06:49:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:24,516 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 7438 transitions. [2021-06-05 06:49:24,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7438 transitions. [2021-06-05 06:49:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:24,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:24,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:24,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:24,719 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 40 times [2021-06-05 06:49:24,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:24,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334023928] [2021-06-05 06:49:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:24,980 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-06-05 06:49:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:25,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:25,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334023928] [2021-06-05 06:49:25,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334023928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:25,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250020331] [2021-06-05 06:49:25,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:25,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:49:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:49:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:25,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-06-05 06:49:25,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:25,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-06-05 06:49:25,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,276 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:25,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 26 [2021-06-05 06:49:25,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:25,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 06:49:25,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,301 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:49:25,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,311 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:49:25,312 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 1 [2021-06-05 06:49:25,323 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:49:25,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:49:25,343 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-06-05 06:49:25,353 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:49:25,362 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,371 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2021-06-05 06:49:25,372 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 23 [2021-06-05 06:49:25,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,393 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:25,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2021-06-05 06:49:25,394 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,405 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:25,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2021-06-05 06:49:25,406 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:25,412 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 1 [2021-06-05 06:49:25,413 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:25,524 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-06-05 06:49:25,525 INFO L628 ElimStorePlain]: treesize reduction 47, result has 69.3 percent of original size [2021-06-05 06:49:25,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:49:25,526 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:821, output treesize:106 [2021-06-05 06:49:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:25,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250020331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:25,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:25,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:49:25,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227374935] [2021-06-05 06:49:25,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:25,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:25,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:25,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:25,622 INFO L87 Difference]: Start difference. First operand 2156 states and 7438 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:26,580 INFO L93 Difference]: Finished difference Result 2977 states and 9961 transitions. [2021-06-05 06:49:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:49:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:26,585 INFO L225 Difference]: With dead ends: 2977 [2021-06-05 06:49:26,585 INFO L226 Difference]: Without dead ends: 2947 [2021-06-05 06:49:26,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1095.7ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:49:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-05 06:49:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2143. [2021-06-05 06:49:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2142 states have (on average 3.4495798319327733) internal successors, (7389), 2142 states have internal predecessors, (7389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 7389 transitions. [2021-06-05 06:49:26,618 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 7389 transitions. Word has length 26 [2021-06-05 06:49:26,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:26,618 INFO L482 AbstractCegarLoop]: Abstraction has 2143 states and 7389 transitions. [2021-06-05 06:49:26,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 7389 transitions. [2021-06-05 06:49:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:26,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:26,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:26,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2819,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:26,822 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 41 times [2021-06-05 06:49:26,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:26,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469537323] [2021-06-05 06:49:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:26,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:27,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:27,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469537323] [2021-06-05 06:49:27,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469537323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:27,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161722157] [2021-06-05 06:49:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:27,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:49:27,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:49:27,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:27,442 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2021-06-05 06:49:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:27,571 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:27,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:49:27,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:27,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:27,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:27,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:49:27,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:27,878 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2021-06-05 06:49:27,878 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-06-05 06:49:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:27,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:27,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:27,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:27,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:27,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:27,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,158 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 06:49:28,158 INFO L628 ElimStorePlain]: treesize reduction 4, result has 98.8 percent of original size [2021-06-05 06:49:28,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:28,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:49:28,173 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:28,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:28,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:28,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,299 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-05 06:49:28,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:28,312 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:28,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:28,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:28,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:28,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:49:28,325 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,431 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-05 06:49:28,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:28,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:28,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:28,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:28,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:28,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:28,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:49:28,457 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:28,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:28,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:49:28,560 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-06-05 06:49:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:28,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161722157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:28,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:28,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 06:49:28,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299998298] [2021-06-05 06:49:28,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:49:28,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:28,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:49:28,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:49:28,697 INFO L87 Difference]: Start difference. First operand 2143 states and 7389 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:29,422 INFO L93 Difference]: Finished difference Result 2746 states and 9264 transitions. [2021-06-05 06:49:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:49:29,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:29,426 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 06:49:29,426 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 06:49:29,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:49:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 06:49:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2147. [2021-06-05 06:49:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.449673811742777) internal successors, (7403), 2146 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:29,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7403 transitions. [2021-06-05 06:49:29,451 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7403 transitions. Word has length 26 [2021-06-05 06:49:29,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:29,451 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 7403 transitions. [2021-06-05 06:49:29,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7403 transitions. [2021-06-05 06:49:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:29,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:29,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:29,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2838,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:29,654 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:29,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 42 times [2021-06-05 06:49:29,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:29,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503709808] [2021-06-05 06:49:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:29,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503709808] [2021-06-05 06:49:29,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503709808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:29,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234970593] [2021-06-05 06:49:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:29,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:49:29,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:29,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:30,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,161 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:49:30,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:30,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:49:30,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,182 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:30,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,190 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:30,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,202 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:30,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 06:49:30,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,210 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:30,211 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,221 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:30,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:49:30,223 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,231 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:49:30,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:49:30,265 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:49:30,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:49:30,276 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:30,285 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,293 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:49:30,294 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,302 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:49:30,302 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,309 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:30,310 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:30,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:49:30,321 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:30,326 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:49:30,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:49:30,327 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:30,390 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-05 06:49:30,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:49:30,391 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-05 06:49:30,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:30,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234970593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:30,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:30,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:49:30,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961874452] [2021-06-05 06:49:30,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:49:30,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:30,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:49:30,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:49:30,472 INFO L87 Difference]: Start difference. First operand 2147 states and 7403 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:31,125 INFO L93 Difference]: Finished difference Result 2702 states and 9149 transitions. [2021-06-05 06:49:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:49:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:31,130 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 06:49:31,130 INFO L226 Difference]: Without dead ends: 2687 [2021-06-05 06:49:31,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:49:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-06-05 06:49:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2153. [2021-06-05 06:49:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.451208178438662) internal successors, (7427), 2152 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7427 transitions. [2021-06-05 06:49:31,155 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7427 transitions. Word has length 26 [2021-06-05 06:49:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:31,155 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 7427 transitions. [2021-06-05 06:49:31,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7427 transitions. [2021-06-05 06:49:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:31,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:31,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:31,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-05 06:49:31,358 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:31,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 55 times [2021-06-05 06:49:31,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:31,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852994345] [2021-06-05 06:49:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:31,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852994345] [2021-06-05 06:49:31,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852994345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798107652] [2021-06-05 06:49:31,518 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:31,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:31,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:31,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:31,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:49:31,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:31,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:31,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:49:31,986 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:31,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:49:31,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:31,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:31,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:31,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:49:31,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:49:32,006 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:49:32,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:49:32,019 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:49:32,026 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:32,033 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:49:32,040 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:32,046 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:32,053 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:32,059 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:32,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:32,062 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:32,080 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:49:32,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:49:32,081 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:49:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:32,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798107652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:32,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:32,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:49:32,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657191648] [2021-06-05 06:49:32,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:32,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:32,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:32,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:32,102 INFO L87 Difference]: Start difference. First operand 2153 states and 7427 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:32,692 INFO L93 Difference]: Finished difference Result 2728 states and 8906 transitions. [2021-06-05 06:49:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:49:32,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:32,696 INFO L225 Difference]: With dead ends: 2728 [2021-06-05 06:49:32,696 INFO L226 Difference]: Without dead ends: 2691 [2021-06-05 06:49:32,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:49:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-05 06:49:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2175. [2021-06-05 06:49:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.4498620055197793) internal successors, (7500), 2174 states have internal predecessors, (7500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7500 transitions. [2021-06-05 06:49:32,741 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7500 transitions. Word has length 26 [2021-06-05 06:49:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:32,741 INFO L482 AbstractCegarLoop]: Abstraction has 2175 states and 7500 transitions. [2021-06-05 06:49:32,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7500 transitions. [2021-06-05 06:49:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:32,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:32,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:32,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2895 [2021-06-05 06:49:32,944 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:32,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:32,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 56 times [2021-06-05 06:49:32,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:32,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054368163] [2021-06-05 06:49:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:33,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054368163] [2021-06-05 06:49:33,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054368163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357348537] [2021-06-05 06:49:33,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:33,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:49:33,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:33,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:33,443 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_328, v_prenex_324], 5=[A, v_prenex_326]} [2021-06-05 06:49:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:33,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:33,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:33,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:33,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:33,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:33,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:33,456 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:33,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:33,526 INFO L628 ElimStorePlain]: treesize reduction 130, result has 40.1 percent of original size [2021-06-05 06:49:33,526 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-05 06:49:33,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:33,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:49:33,530 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:33,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 06:49:33,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:33,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:33,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:49:33,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-06-05 06:49:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:33,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357348537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:33,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:33,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:49:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208179386] [2021-06-05 06:49:33,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:33,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:33,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:33,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:33,611 INFO L87 Difference]: Start difference. First operand 2175 states and 7500 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:34,499 INFO L93 Difference]: Finished difference Result 2675 states and 8982 transitions. [2021-06-05 06:49:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:49:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:34,503 INFO L225 Difference]: With dead ends: 2675 [2021-06-05 06:49:34,503 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 06:49:34,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:49:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 06:49:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2171. [2021-06-05 06:49:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 3.4442396313364054) internal successors, (7474), 2170 states have internal predecessors, (7474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 7474 transitions. [2021-06-05 06:49:34,529 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 7474 transitions. Word has length 26 [2021-06-05 06:49:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:34,529 INFO L482 AbstractCegarLoop]: Abstraction has 2171 states and 7474 transitions. [2021-06-05 06:49:34,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 7474 transitions. [2021-06-05 06:49:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:34,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:34,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:34,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:34,732 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:34,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:34,732 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 57 times [2021-06-05 06:49:34,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:34,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647210600] [2021-06-05 06:49:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:34,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647210600] [2021-06-05 06:49:34,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647210600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:34,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496649252] [2021-06-05 06:49:34,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:35,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:49:35,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:35,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 06:49:35,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:35,352 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_333, v_prenex_335], 5=[A, v_prenex_334]} [2021-06-05 06:49:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:35,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:35,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:35,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:35,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:35,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:35,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:35,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:35,451 INFO L628 ElimStorePlain]: treesize reduction 143, result has 42.8 percent of original size [2021-06-05 06:49:35,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:35,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 06:49:35,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:35,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:35,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:49:35,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:35,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:35,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:35,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:35,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:35,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 06:49:35,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:35,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:35,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:49:35,538 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:303, output treesize:24 [2021-06-05 06:49:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496649252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:49:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937838474] [2021-06-05 06:49:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:35,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:35,574 INFO L87 Difference]: Start difference. First operand 2171 states and 7474 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:36,190 INFO L93 Difference]: Finished difference Result 2624 states and 8866 transitions. [2021-06-05 06:49:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:49:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:36,194 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 06:49:36,194 INFO L226 Difference]: Without dead ends: 2609 [2021-06-05 06:49:36,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 788.0ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:49:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-05 06:49:36,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 2181. [2021-06-05 06:49:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.445412844036697) internal successors, (7511), 2180 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:36,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7511 transitions. [2021-06-05 06:49:36,220 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7511 transitions. Word has length 26 [2021-06-05 06:49:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:36,220 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 7511 transitions. [2021-06-05 06:49:36,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:36,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7511 transitions. [2021-06-05 06:49:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:36,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:36,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:36,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 06:49:36,423 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:36,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 43 times [2021-06-05 06:49:36,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:36,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842299034] [2021-06-05 06:49:36,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:36,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:36,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842299034] [2021-06-05 06:49:36,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842299034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:36,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623825311] [2021-06-05 06:49:36,709 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:49:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:37,051 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_338], 2=[A, v_prenex_336]} [2021-06-05 06:49:37,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:37,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:49:37,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:37,140 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-06-05 06:49:37,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:37,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:37,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:37,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:37,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:37,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:37,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:37,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:37,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:37,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:49:37,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:37,229 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-05 06:49:37,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:49:37,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-06-05 06:49:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:37,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623825311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:37,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:37,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:49:37,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413747440] [2021-06-05 06:49:37,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:37,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:37,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:37,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:37,267 INFO L87 Difference]: Start difference. First operand 2181 states and 7511 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:37,933 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 06:49:38,084 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 06:49:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:38,251 INFO L93 Difference]: Finished difference Result 2827 states and 9420 transitions. [2021-06-05 06:49:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:49:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:38,255 INFO L225 Difference]: With dead ends: 2827 [2021-06-05 06:49:38,255 INFO L226 Difference]: Without dead ends: 2797 [2021-06-05 06:49:38,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1139.6ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:49:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-06-05 06:49:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2189. [2021-06-05 06:49:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 3.4437842778793417) internal successors, (7535), 2188 states have internal predecessors, (7535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:38,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 7535 transitions. [2021-06-05 06:49:38,283 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 7535 transitions. Word has length 26 [2021-06-05 06:49:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:38,283 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 7535 transitions. [2021-06-05 06:49:38,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 7535 transitions. [2021-06-05 06:49:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:38,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:38,286 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:38,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:38,488 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash 352643691, now seen corresponding path program 58 times [2021-06-05 06:49:38,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:38,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435457388] [2021-06-05 06:49:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:38,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:38,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435457388] [2021-06-05 06:49:38,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435457388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:38,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856423981] [2021-06-05 06:49:38,637 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:38,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:49:38,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:38,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:39,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:49:39,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:49:39,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:39,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:39,125 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:39,131 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:39,139 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:49:39,145 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:49:39,152 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:49:39,160 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:49:39,167 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:49:39,174 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:49:39,181 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:39,187 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:39,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:49:39,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:39,209 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-06-05 06:49:39,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:49:39,210 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:49:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856423981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:39,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:39,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:49:39,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056254018] [2021-06-05 06:49:39,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:39,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:39,231 INFO L87 Difference]: Start difference. First operand 2189 states and 7535 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:40,061 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 06:49:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:40,306 INFO L93 Difference]: Finished difference Result 3223 states and 10393 transitions. [2021-06-05 06:49:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:49:40,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:40,311 INFO L225 Difference]: With dead ends: 3223 [2021-06-05 06:49:40,311 INFO L226 Difference]: Without dead ends: 3186 [2021-06-05 06:49:40,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 988.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:49:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-06-05 06:49:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2237. [2021-06-05 06:49:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.4485688729874777) internal successors, (7711), 2236 states have internal predecessors, (7711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7711 transitions. [2021-06-05 06:49:40,342 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7711 transitions. Word has length 26 [2021-06-05 06:49:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:40,342 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 7711 transitions. [2021-06-05 06:49:40,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7711 transitions. [2021-06-05 06:49:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:40,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:40,344 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:40,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:40,546 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash 392132503, now seen corresponding path program 44 times [2021-06-05 06:49:40,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:40,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831850864] [2021-06-05 06:49:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:40,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831850864] [2021-06-05 06:49:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831850864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:40,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836678602] [2021-06-05 06:49:40,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:40,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:49:40,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:49:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:41,240 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 06:49:41,786 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:41,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:49:41,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:41,799 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:41,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:49:41,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,124 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 126 [2021-06-05 06:49:42,124 INFO L628 ElimStorePlain]: treesize reduction 74, result has 84.5 percent of original size [2021-06-05 06:49:42,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:42,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:49:42,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,290 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 06:49:42,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:42,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:42,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:49:42,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,325 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:42,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:49:42,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,455 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 06:49:42,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:42,476 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:42,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 06:49:42,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,604 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:49:42,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:42,628 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:42,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:49:42,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:42,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:49:42,650 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:42,889 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-06-05 06:49:42,890 INFO L628 ElimStorePlain]: treesize reduction 27, result has 91.1 percent of original size [2021-06-05 06:49:42,908 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:42,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:49:42,910 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:43,014 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 06:49:43,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:43,032 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:43,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:49:43,035 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:43,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:43,150 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:43,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:49:43,152 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:43,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:43,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:49:43,261 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:412 [2021-06-05 06:49:43,410 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-05 06:49:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:43,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836678602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:43,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:43,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:49:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329125984] [2021-06-05 06:49:43,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:49:43,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:49:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:49:43,510 INFO L87 Difference]: Start difference. First operand 2237 states and 7711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:44,515 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-06-05 06:49:45,039 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 06:49:45,439 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-06-05 06:49:45,833 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 96 [2021-06-05 06:49:46,059 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:49:46,639 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 107 [2021-06-05 06:49:47,108 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 89 [2021-06-05 06:49:47,792 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 108 [2021-06-05 06:49:47,981 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 06:49:48,549 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-05 06:49:48,744 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-06-05 06:49:49,076 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-05 06:49:49,469 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-06-05 06:49:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:49,665 INFO L93 Difference]: Finished difference Result 3399 states and 11009 transitions. [2021-06-05 06:49:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:49:49,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:49,670 INFO L225 Difference]: With dead ends: 3399 [2021-06-05 06:49:49,670 INFO L226 Difference]: Without dead ends: 3354 [2021-06-05 06:49:49,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 6029.8ms TimeCoverageRelationStatistics Valid=484, Invalid=2378, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:49:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-06-05 06:49:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 2260. [2021-06-05 06:49:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 3.454183266932271) internal successors, (7803), 2259 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 7803 transitions. [2021-06-05 06:49:49,700 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 7803 transitions. Word has length 26 [2021-06-05 06:49:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:49,701 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 7803 transitions. [2021-06-05 06:49:49,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 7803 transitions. [2021-06-05 06:49:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:49,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:49,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:49,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:49,904 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash -658448197, now seen corresponding path program 45 times [2021-06-05 06:49:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:49,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300141804] [2021-06-05 06:49:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:50,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300141804] [2021-06-05 06:49:50,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300141804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751315581] [2021-06-05 06:49:50,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:50,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:49:50,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:50,418 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 06:49:50,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:50,692 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:49:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:49:50,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:50,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:50,717 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:50,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-06-05 06:49:50,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:51,088 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 156 [2021-06-05 06:49:51,088 INFO L628 ElimStorePlain]: treesize reduction 74, result has 85.2 percent of original size [2021-06-05 06:49:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:51,109 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:49:51,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:51,270 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 06:49:51,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:51,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:51,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:49:51,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:51,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:51,317 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:49:51,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:51,605 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 144 [2021-06-05 06:49:51,606 INFO L628 ElimStorePlain]: treesize reduction 49, result has 87.8 percent of original size [2021-06-05 06:49:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:51,630 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:51,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:51,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:51,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:51,654 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:51,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:49:51,655 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:51,897 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-05 06:49:51,898 INFO L628 ElimStorePlain]: treesize reduction 33, result has 90.0 percent of original size [2021-06-05 06:49:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:51,916 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:49:51,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:49:51,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:52,024 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:49:52,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:52,045 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:49:52,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-06-05 06:49:52,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:52,151 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-05 06:49:52,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:52,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:52,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:49:52,171 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:52,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:52,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:52,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:49:52,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:52,466 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2021-06-05 06:49:52,466 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.4 percent of original size [2021-06-05 06:49:52,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:49:52,482 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-06-05 06:49:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:52,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751315581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:52,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:52,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:49:52,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484333361] [2021-06-05 06:49:52,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:52,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:52,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:52,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:52,629 INFO L87 Difference]: Start difference. First operand 2260 states and 7803 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:52,921 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 06:49:53,720 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 36 [2021-06-05 06:49:54,206 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-06-05 06:49:54,519 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 108 [2021-06-05 06:49:54,856 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-06-05 06:49:55,223 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 112 [2021-06-05 06:49:55,601 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 06:49:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:55,852 INFO L93 Difference]: Finished difference Result 3654 states and 11998 transitions. [2021-06-05 06:49:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:49:55,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:55,857 INFO L225 Difference]: With dead ends: 3654 [2021-06-05 06:49:55,857 INFO L226 Difference]: Without dead ends: 3624 [2021-06-05 06:49:55,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3381.2ms TimeCoverageRelationStatistics Valid=385, Invalid=1255, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:49:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-06-05 06:49:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2265. [2021-06-05 06:49:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.4487632508833923) internal successors, (7808), 2264 states have internal predecessors, (7808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7808 transitions. [2021-06-05 06:49:55,890 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7808 transitions. Word has length 26 [2021-06-05 06:49:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:55,890 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 7808 transitions. [2021-06-05 06:49:55,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7808 transitions. [2021-06-05 06:49:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:55,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:55,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:56,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-06-05 06:49:56,093 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:56,094 INFO L82 PathProgramCache]: Analyzing trace with hash 578637215, now seen corresponding path program 59 times [2021-06-05 06:49:56,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:56,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140662790] [2021-06-05 06:49:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:56,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:56,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140662790] [2021-06-05 06:49:56,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140662790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:56,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49738918] [2021-06-05 06:49:56,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:56,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:49:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:56,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:56,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:56,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:49:56,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:49:56,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:56,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:49:56,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:56,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:49:56,796 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:49:56,804 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:49:56,811 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:49:56,817 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:49:56,824 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:49:56,830 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:49:56,837 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:49:56,843 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:49:56,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:49:56,846 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:56,864 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 06:49:56,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:49:56,864 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:49:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:56,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49738918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:56,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:56,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:49:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456656874] [2021-06-05 06:49:56,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:56,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:56,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:56,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:56,890 INFO L87 Difference]: Start difference. First operand 2265 states and 7808 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:49:57,902 INFO L93 Difference]: Finished difference Result 3677 states and 11972 transitions. [2021-06-05 06:49:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:49:57,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:49:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:49:57,907 INFO L225 Difference]: With dead ends: 3677 [2021-06-05 06:49:57,907 INFO L226 Difference]: Without dead ends: 3647 [2021-06-05 06:49:57,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:49:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-05 06:49:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 2319. [2021-06-05 06:49:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4516824849007763) internal successors, (8001), 2318 states have internal predecessors, (8001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:57,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 8001 transitions. [2021-06-05 06:49:57,941 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 8001 transitions. Word has length 26 [2021-06-05 06:49:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:49:57,942 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 8001 transitions. [2021-06-05 06:49:57,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:49:57,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 8001 transitions. [2021-06-05 06:49:57,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:49:57,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:49:57,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:49:58,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-06-05 06:49:58,145 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:49:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:49:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 60 times [2021-06-05 06:49:58,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:49:58,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685091026] [2021-06-05 06:49:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:49:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:49:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:58,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:49:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685091026] [2021-06-05 06:49:58,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685091026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:58,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902922947] [2021-06-05 06:49:58,273 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:49:58,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:49:58,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:49:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:49:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:49:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,505 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-05 06:49:58,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:49:58,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:58,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2021-06-05 06:49:58,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:58,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 06:49:58,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,588 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:49:58,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2021-06-05 06:49:58,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,614 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-05 06:49:58,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-05 06:49:58,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,631 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:49:58,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,656 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:49:58,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 28 [2021-06-05 06:49:58,657 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,672 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:49:58,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,688 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:49:58,689 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,703 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:49:58,704 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,718 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:49:58,719 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,732 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:49:58,733 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,747 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:49:58,747 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,768 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-05 06:49:58,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:49:58,769 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,789 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-05 06:49:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:49:58,790 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:49:58,798 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-05 06:49:58,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:49:58,799 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:49:58,864 INFO L628 ElimStorePlain]: treesize reduction 132, result has 34.3 percent of original size [2021-06-05 06:49:58,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:49:58,865 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:657, output treesize:69 [2021-06-05 06:49:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:49:58,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902922947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:49:58,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:49:58,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:49:58,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619514938] [2021-06-05 06:49:58,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:49:58,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:49:58,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:49:58,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:49:58,946 INFO L87 Difference]: Start difference. First operand 2319 states and 8001 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:00,627 INFO L93 Difference]: Finished difference Result 3983 states and 12879 transitions. [2021-06-05 06:50:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:50:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:00,633 INFO L225 Difference]: With dead ends: 3983 [2021-06-05 06:50:00,633 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 06:50:00,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1497.0ms TimeCoverageRelationStatistics Valid=466, Invalid=1696, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:50:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 06:50:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2319. [2021-06-05 06:50:00,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 3.4490940465918896) internal successors, (7995), 2318 states have internal predecessors, (7995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 7995 transitions. [2021-06-05 06:50:00,668 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 7995 transitions. Word has length 26 [2021-06-05 06:50:00,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:00,668 INFO L482 AbstractCegarLoop]: Abstraction has 2319 states and 7995 transitions. [2021-06-05 06:50:00,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 7995 transitions. [2021-06-05 06:50:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:00,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:00,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:00,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:00,871 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:00,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:00,871 INFO L82 PathProgramCache]: Analyzing trace with hash 534773347, now seen corresponding path program 46 times [2021-06-05 06:50:00,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:00,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637463854] [2021-06-05 06:50:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:01,154 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 06:50:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:01,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:01,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637463854] [2021-06-05 06:50:01,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637463854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:01,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438216094] [2021-06-05 06:50:01,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:01,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:50:01,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:01,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:50:01,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:01,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 06:50:01,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,551 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-06-05 06:50:01,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,584 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 06:50:01,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,600 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:50:01,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,614 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:50:01,615 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:01,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:50:01,633 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,648 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:50:01,649 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,663 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:50:01,664 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,676 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:50:01,676 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:50:01,688 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,698 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:50:01,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,710 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 1 [2021-06-05 06:50:01,710 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:01,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-06-05 06:50:01,725 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:50:01,736 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,744 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 06:50:01,745 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:01,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:01,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:50:01,752 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:01,822 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-05 06:50:01,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:50:01,823 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-06-05 06:50:01,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:01,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438216094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:01,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:01,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:50:01,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099747318] [2021-06-05 06:50:01,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:50:01,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:01,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:50:01,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:50:01,900 INFO L87 Difference]: Start difference. First operand 2319 states and 7995 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:03,651 INFO L93 Difference]: Finished difference Result 3035 states and 10159 transitions. [2021-06-05 06:50:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:50:03,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:03,656 INFO L225 Difference]: With dead ends: 3035 [2021-06-05 06:50:03,656 INFO L226 Difference]: Without dead ends: 3005 [2021-06-05 06:50:03,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1726.8ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:50:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-05 06:50:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2314. [2021-06-05 06:50:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 2313 states have (on average 3.4466061392131433) internal successors, (7972), 2313 states have internal predecessors, (7972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 7972 transitions. [2021-06-05 06:50:03,685 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 7972 transitions. Word has length 26 [2021-06-05 06:50:03,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:03,685 INFO L482 AbstractCegarLoop]: Abstraction has 2314 states and 7972 transitions. [2021-06-05 06:50:03,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 7972 transitions. [2021-06-05 06:50:03,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:03,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:03,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:03,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3391,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:03,888 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-06-05 06:50:03,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:03,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945060952] [2021-06-05 06:50:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:04,120 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-05 06:50:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:04,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:04,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945060952] [2021-06-05 06:50:04,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945060952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:04,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942336150] [2021-06-05 06:50:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:04,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:50:04,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:04,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:50:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:04,681 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 06:50:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:04,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:04,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:50:04,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:04,843 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:04,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:50:04,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,122 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2021-06-05 06:50:05,123 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.6 percent of original size [2021-06-05 06:50:05,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:50:05,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,148 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:05,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:50:05,149 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,277 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 06:50:05,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:50:05,293 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,303 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:50:05,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,420 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 06:50:05,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,432 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:05,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:50:05,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:50:05,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,549 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 06:50:05,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,561 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:05,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:50:05,563 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:05,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-05 06:50:05,572 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:05,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:05,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:50:05,671 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:411, output treesize:176 [2021-06-05 06:50:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:05,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942336150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:05,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:05,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:50:05,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454002175] [2021-06-05 06:50:05,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:50:05,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:05,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:50:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:50:05,796 INFO L87 Difference]: Start difference. First operand 2314 states and 7972 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:07,032 INFO L93 Difference]: Finished difference Result 3062 states and 10279 transitions. [2021-06-05 06:50:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:50:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:07,036 INFO L225 Difference]: With dead ends: 3062 [2021-06-05 06:50:07,036 INFO L226 Difference]: Without dead ends: 3037 [2021-06-05 06:50:07,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1469.1ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:50:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-06-05 06:50:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2304. [2021-06-05 06:50:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 3.449413808076422) internal successors, (7944), 2303 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 7944 transitions. [2021-06-05 06:50:07,065 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 7944 transitions. Word has length 26 [2021-06-05 06:50:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:07,065 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 7944 transitions. [2021-06-05 06:50:07,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 7944 transitions. [2021-06-05 06:50:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:07,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:07,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:07,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:07,268 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 61 times [2021-06-05 06:50:07,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:07,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511560062] [2021-06-05 06:50:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:07,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511560062] [2021-06-05 06:50:07,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511560062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:07,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122902702] [2021-06-05 06:50:07,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:50:07,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:07,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-06-05 06:50:08,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-06-05 06:50:08,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:50:08,018 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:50:08,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-06-05 06:50:08,032 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-06-05 06:50:08,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-06-05 06:50:08,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:50:08,055 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-06-05 06:50:08,063 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:50:08,071 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:50:08,078 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-06-05 06:50:08,086 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:50:08,093 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:50:08,105 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:50:08,111 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:08,134 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-06-05 06:50:08,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:50:08,135 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-06-05 06:50:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:08,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122902702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:08,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:08,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:50:08,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006896730] [2021-06-05 06:50:08,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:50:08,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:50:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:50:08,163 INFO L87 Difference]: Start difference. First operand 2304 states and 7944 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:09,570 INFO L93 Difference]: Finished difference Result 3206 states and 10682 transitions. [2021-06-05 06:50:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:50:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:09,574 INFO L225 Difference]: With dead ends: 3206 [2021-06-05 06:50:09,574 INFO L226 Difference]: Without dead ends: 3169 [2021-06-05 06:50:09,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1376.2ms TimeCoverageRelationStatistics Valid=459, Invalid=1703, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:50:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-06-05 06:50:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 2344. [2021-06-05 06:50:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 3.452838241570636) internal successors, (8090), 2343 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8090 transitions. [2021-06-05 06:50:09,611 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8090 transitions. Word has length 26 [2021-06-05 06:50:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:09,611 INFO L482 AbstractCegarLoop]: Abstraction has 2344 states and 8090 transitions. [2021-06-05 06:50:09,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8090 transitions. [2021-06-05 06:50:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:09,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:09,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:09,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:09,815 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 62 times [2021-06-05 06:50:09,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:09,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017067890] [2021-06-05 06:50:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:09,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017067890] [2021-06-05 06:50:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017067890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112699623] [2021-06-05 06:50:09,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:10,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:50:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:50:10,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:10,363 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_401, v_prenex_403], 5=[A, v_prenex_399]} [2021-06-05 06:50:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:10,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:50:10,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:10,459 INFO L628 ElimStorePlain]: treesize reduction 133, result has 44.6 percent of original size [2021-06-05 06:50:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:10,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:50:10,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:10,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:50:10,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:10,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:10,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:50:10,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:10,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:10,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 06:50:10,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:31 [2021-06-05 06:50:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:10,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112699623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:10,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:10,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 06:50:10,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847111074] [2021-06-05 06:50:10,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:50:10,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:50:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:50:10,571 INFO L87 Difference]: Start difference. First operand 2344 states and 8090 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:12,352 INFO L93 Difference]: Finished difference Result 3360 states and 11166 transitions. [2021-06-05 06:50:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:50:12,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:12,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:12,357 INFO L225 Difference]: With dead ends: 3360 [2021-06-05 06:50:12,357 INFO L226 Difference]: Without dead ends: 3326 [2021-06-05 06:50:12,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1598.2ms TimeCoverageRelationStatistics Valid=528, Invalid=1922, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:50:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-05 06:50:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2364. [2021-06-05 06:50:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 3.446043165467626) internal successors, (8143), 2363 states have internal predecessors, (8143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 8143 transitions. [2021-06-05 06:50:12,392 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 8143 transitions. Word has length 26 [2021-06-05 06:50:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:12,392 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 8143 transitions. [2021-06-05 06:50:12,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 8143 transitions. [2021-06-05 06:50:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:12,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:12,395 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:12,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3546 [2021-06-05 06:50:12,596 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:12,596 INFO L82 PathProgramCache]: Analyzing trace with hash 256075815, now seen corresponding path program 48 times [2021-06-05 06:50:12,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:12,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132230353] [2021-06-05 06:50:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:12,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:12,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132230353] [2021-06-05 06:50:12,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132230353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:12,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897606230] [2021-06-05 06:50:12,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:12,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:50:12,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:50:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:13,375 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-05 06:50:13,862 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_437, v_prenex_427, A, v_prenex_439, v_prenex_428, v_prenex_431, v_prenex_432, v_prenex_421, v_prenex_423, v_prenex_435], 3=[v_prenex_422, v_prenex_425]} [2021-06-05 06:50:13,890 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:50:13,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 06:50:13,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:14,230 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 147 [2021-06-05 06:50:14,230 INFO L628 ElimStorePlain]: treesize reduction 122, result has 76.9 percent of original size [2021-06-05 06:50:14,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_427 vanished before elimination [2021-06-05 06:50:14,261 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:50:14,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:50:14,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:14,413 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 06:50:14,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:14,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:50:14,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:14,583 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-05 06:50:14,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:14,605 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:50:14,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:50:14,606 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:14,759 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-05 06:50:14,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:14,759 INFO L518 ElimStorePlain]: Eliminatee v_prenex_431 vanished before elimination [2021-06-05 06:50:14,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:14,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:50:14,780 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:14,949 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-05 06:50:14,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:14,969 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:50:14,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:50:14,971 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:15,117 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-05 06:50:15,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:15,139 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:50:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:50:15,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:15,280 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-05 06:50:15,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:15,299 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:50:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:50:15,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:15,439 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-05 06:50:15,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:15,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:15,456 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 18 treesize of output 28 [2021-06-05 06:50:15,461 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:15,591 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-05 06:50:15,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:15,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:15,624 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-06-05 06:50:15,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-06-05 06:50:15,628 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:15,791 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 06:50:15,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:15,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:50:15,813 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:490 [2021-06-05 06:50:16,054 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 06:50:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:16,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897606230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:16,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:16,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:50:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528181409] [2021-06-05 06:50:16,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:50:16,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:16,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:50:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:50:16,157 INFO L87 Difference]: Start difference. First operand 2364 states and 8143 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:16,784 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-05 06:50:17,736 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2021-06-05 06:50:18,072 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-05 06:50:18,403 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 06:50:18,644 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-05 06:50:18,888 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-05 06:50:19,117 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-05 06:50:19,716 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-06-05 06:50:19,963 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-06-05 06:50:20,756 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 96 [2021-06-05 06:50:21,287 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-05 06:50:21,515 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 06:50:21,845 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 34 [2021-06-05 06:50:22,000 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 30 [2021-06-05 06:50:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:22,205 INFO L93 Difference]: Finished difference Result 3432 states and 11237 transitions. [2021-06-05 06:50:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:50:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:22,210 INFO L225 Difference]: With dead ends: 3432 [2021-06-05 06:50:22,210 INFO L226 Difference]: Without dead ends: 3387 [2021-06-05 06:50:22,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 5923.1ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:50:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2021-06-05 06:50:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 2369. [2021-06-05 06:50:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 3.4451013513513513) internal successors, (8158), 2368 states have internal predecessors, (8158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 8158 transitions. [2021-06-05 06:50:22,241 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 8158 transitions. Word has length 26 [2021-06-05 06:50:22,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:22,241 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 8158 transitions. [2021-06-05 06:50:22,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:22,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 8158 transitions. [2021-06-05 06:50:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:22,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:22,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:22,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 06:50:22,449 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1128567001, now seen corresponding path program 49 times [2021-06-05 06:50:22,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:22,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542961608] [2021-06-05 06:50:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:22,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:22,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542961608] [2021-06-05 06:50:22,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542961608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217195006] [2021-06-05 06:50:22,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:50:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:23,181 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-05 06:50:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:23,394 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-05 06:50:23,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:50:23,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:23,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:23,420 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:50:23,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-06-05 06:50:23,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:23,789 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-06-05 06:50:23,789 INFO L628 ElimStorePlain]: treesize reduction 76, result has 84.7 percent of original size [2021-06-05 06:50:23,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:23,813 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:50:23,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-06-05 06:50:23,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:23,977 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 06:50:23,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:23,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,002 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:50:24,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:50:24,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:24,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,027 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-05 06:50:24,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:50:24,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:24,332 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 144 [2021-06-05 06:50:24,333 INFO L628 ElimStorePlain]: treesize reduction 33, result has 91.6 percent of original size [2021-06-05 06:50:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:50:24,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:24,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:50:24,380 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:24,614 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 136 [2021-06-05 06:50:24,614 INFO L628 ElimStorePlain]: treesize reduction 49, result has 85.8 percent of original size [2021-06-05 06:50:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:24,631 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:50:24,637 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:24,840 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 127 [2021-06-05 06:50:24,841 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.8 percent of original size [2021-06-05 06:50:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,859 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:50:24,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:50:24,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:24,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:24,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:24,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:24,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-06-05 06:50:24,975 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:25,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:25,085 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-05 06:50:25,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-06-05 06:50:25,086 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:25,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:25,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-05 06:50:25,191 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-06-05 06:50:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:25,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217195006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:25,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:25,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:50:25,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248394589] [2021-06-05 06:50:25,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:50:25,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:50:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:50:25,331 INFO L87 Difference]: Start difference. First operand 2369 states and 8158 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:25,628 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-06-05 06:50:26,540 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 06:50:26,726 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-05 06:50:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:26,965 INFO L93 Difference]: Finished difference Result 3462 states and 11530 transitions. [2021-06-05 06:50:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:50:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:26,970 INFO L225 Difference]: With dead ends: 3462 [2021-06-05 06:50:26,970 INFO L226 Difference]: Without dead ends: 3432 [2021-06-05 06:50:26,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1929.5ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:50:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3432 states. [2021-06-05 06:50:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3432 to 2352. [2021-06-05 06:50:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.441514249255636) internal successors, (8091), 2351 states have internal predecessors, (8091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8091 transitions. [2021-06-05 06:50:27,002 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8091 transitions. Word has length 26 [2021-06-05 06:50:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:27,003 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8091 transitions. [2021-06-05 06:50:27,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8091 transitions. [2021-06-05 06:50:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:27,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:27,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:27,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3598 [2021-06-05 06:50:27,206 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 50 times [2021-06-05 06:50:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:27,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556245854] [2021-06-05 06:50:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:27,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556245854] [2021-06-05 06:50:27,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556245854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289583052] [2021-06-05 06:50:27,526 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:27,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:50:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:27,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 06:50:27,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,770 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 06:50:27,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:27,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:50:27,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:50:27,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-06-05 06:50:27,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,810 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:27,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 06:50:27,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,819 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:50:27,820 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,830 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:27,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-06-05 06:50:27,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,840 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2021-06-05 06:50:27,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:50:27,848 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:27,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:50:27,860 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,867 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-05 06:50:27,868 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,878 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:50:27,878 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,887 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:50:27,887 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,894 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:50:27,895 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:27,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:50:27,907 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:27,912 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-05 06:50:27,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:50:27,913 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:27,976 INFO L628 ElimStorePlain]: treesize reduction 15, result has 83.9 percent of original size [2021-06-05 06:50:27,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:50:27,977 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-06-05 06:50:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:28,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289583052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:28,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:28,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:50:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440911085] [2021-06-05 06:50:28,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:50:28,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:28,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:50:28,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:50:28,059 INFO L87 Difference]: Start difference. First operand 2352 states and 8091 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:28,918 INFO L93 Difference]: Finished difference Result 3124 states and 10478 transitions. [2021-06-05 06:50:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:50:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:28,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:28,924 INFO L225 Difference]: With dead ends: 3124 [2021-06-05 06:50:28,924 INFO L226 Difference]: Without dead ends: 3099 [2021-06-05 06:50:28,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 999.7ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:50:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-06-05 06:50:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2339. [2021-06-05 06:50:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.441830624465355) internal successors, (8047), 2338 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 8047 transitions. [2021-06-05 06:50:28,968 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 8047 transitions. Word has length 26 [2021-06-05 06:50:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:28,968 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 8047 transitions. [2021-06-05 06:50:28,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 8047 transitions. [2021-06-05 06:50:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:28,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:28,972 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:29,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3645,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:29,186 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-06-05 06:50:29,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:29,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669514530] [2021-06-05 06:50:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:29,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669514530] [2021-06-05 06:50:29,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669514530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:29,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885169435] [2021-06-05 06:50:29,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:29,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:50:29,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:50:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:29,840 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 06:50:29,986 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_481, v_prenex_482, v_prenex_478], 3=[v_prenex_480]} [2021-06-05 06:50:29,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,001 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:30,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:50:30,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-06-05 06:50:30,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,319 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-05 06:50:30,319 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.4 percent of original size [2021-06-05 06:50:30,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,334 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:30,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-06-05 06:50:30,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-06-05 06:50:30,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,486 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:50:30,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:50:30,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,513 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:30,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:50:30,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,649 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-05 06:50:30,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-06-05 06:50:30,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,673 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 06:50:30,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 06:50:30,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,781 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-05 06:50:30,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 06:50:30,795 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:30,805 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-05 06:50:30,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 06:50:30,806 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:30,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:30,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-05 06:50:30,906 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:421, output treesize:186 [2021-06-05 06:50:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:31,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885169435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:31,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:31,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 06:50:31,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348508583] [2021-06-05 06:50:31,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:50:31,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:31,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:50:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:50:31,035 INFO L87 Difference]: Start difference. First operand 2339 states and 8047 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:31,762 INFO L93 Difference]: Finished difference Result 2991 states and 10107 transitions. [2021-06-05 06:50:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:50:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:31,766 INFO L225 Difference]: With dead ends: 2991 [2021-06-05 06:50:31,766 INFO L226 Difference]: Without dead ends: 2976 [2021-06-05 06:50:31,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1089.5ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:50:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-05 06:50:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2333. [2021-06-05 06:50:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2332 states have (on average 3.442967409948542) internal successors, (8029), 2332 states have internal predecessors, (8029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:31,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 8029 transitions. [2021-06-05 06:50:31,795 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 8029 transitions. Word has length 26 [2021-06-05 06:50:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:31,795 INFO L482 AbstractCegarLoop]: Abstraction has 2333 states and 8029 transitions. [2021-06-05 06:50:31,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 8029 transitions. [2021-06-05 06:50:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:31,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:31,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:31,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3664,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:31,999 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash 118535907, now seen corresponding path program 63 times [2021-06-05 06:50:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:31,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122021958] [2021-06-05 06:50:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:32,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:32,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122021958] [2021-06-05 06:50:32,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122021958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:32,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116224347] [2021-06-05 06:50:32,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:32,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:50:32,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:50:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:32,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,650 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:50:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 06:50:32,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,677 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:50:32,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:50:32,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,695 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:50:32,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,710 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:50:32,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,732 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-05 06:50:32,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-06-05 06:50:32,733 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,755 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:50:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-05 06:50:32,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,772 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:50:32,773 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,787 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:50:32,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,809 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:50:32,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-05 06:50:32,811 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,832 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:50:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 06:50:32,834 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,854 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-06-05 06:50:32,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-06-05 06:50:32,856 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,877 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-05 06:50:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-06-05 06:50:32,878 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:32,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 06:50:32,904 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,918 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:50:32,919 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,932 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-06-05 06:50:32,932 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:32,940 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:32,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-06-05 06:50:32,941 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:33,022 INFO L628 ElimStorePlain]: treesize reduction 105, result has 47.0 percent of original size [2021-06-05 06:50:33,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:50:33,023 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-06-05 06:50:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:33,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116224347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:33,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:33,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 06:50:33,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212762220] [2021-06-05 06:50:33,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:50:33,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:50:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:50:33,095 INFO L87 Difference]: Start difference. First operand 2333 states and 8029 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:35,229 INFO L93 Difference]: Finished difference Result 3591 states and 11838 transitions. [2021-06-05 06:50:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:50:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:35,235 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 06:50:35,235 INFO L226 Difference]: Without dead ends: 3547 [2021-06-05 06:50:35,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1959.4ms TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:50:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-06-05 06:50:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 2360. [2021-06-05 06:50:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-06-05 06:50:35,270 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-06-05 06:50:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:35,270 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-06-05 06:50:35,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-06-05 06:50:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:35,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:35,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:35,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:35,474 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 64 times [2021-06-05 06:50:35,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:35,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755414658] [2021-06-05 06:50:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:35,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:35,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755414658] [2021-06-05 06:50:35,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755414658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:35,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798447437] [2021-06-05 06:50:35,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:35,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:50:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:35,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 06:50:35,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:36,162 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_486], 5=[v_prenex_487, v_prenex_488]} [2021-06-05 06:50:36,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 06:50:36,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:36,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:36,174 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-06-05 06:50:36,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:36,243 INFO L628 ElimStorePlain]: treesize reduction 130, result has 41.2 percent of original size [2021-06-05 06:50:36,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_486 vanished before elimination [2021-06-05 06:50:36,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:36,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:50:36,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:36,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:36,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:36,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:50:36,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:50:36,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:36,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:36,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:50:36,293 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:274, output treesize:24 [2021-06-05 06:50:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:36,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798447437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:36,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:36,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 06:50:36,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851293095] [2021-06-05 06:50:36,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:50:36,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:36,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:50:36,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:50:36,364 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:37,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:37,603 INFO L93 Difference]: Finished difference Result 3132 states and 10494 transitions. [2021-06-05 06:50:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:50:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:37,608 INFO L225 Difference]: With dead ends: 3132 [2021-06-05 06:50:37,608 INFO L226 Difference]: Without dead ends: 3117 [2021-06-05 06:50:37,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1251.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:50:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-06-05 06:50:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2360. [2021-06-05 06:50:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.4412886816447648) internal successors, (8118), 2359 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 8118 transitions. [2021-06-05 06:50:37,638 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 8118 transitions. Word has length 26 [2021-06-05 06:50:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:37,638 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 8118 transitions. [2021-06-05 06:50:37,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 8118 transitions. [2021-06-05 06:50:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:50:37,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:37,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:37,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-05 06:50:37,842 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1440707985, now seen corresponding path program 65 times [2021-06-05 06:50:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:37,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67347465] [2021-06-05 06:50:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:38,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:38,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67347465] [2021-06-05 06:50:38,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67347465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:38,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827074364] [2021-06-05 06:50:38,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:38,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:50:38,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:38,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 06:50:38,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:38,443 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-05 06:50:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:38,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:38,747 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:50:38,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-06-05 06:50:38,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:38,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:38,787 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-05 06:50:38,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 06:50:38,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:39,167 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:50:39,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:39,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 06:50:39,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:39,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,230 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:50:39,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-06-05 06:50:39,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:39,586 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 06:50:39,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:39,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:39,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-06-05 06:50:39,626 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,642 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-05 06:50:39,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-06-05 06:50:39,643 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:39,982 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2021-06-05 06:50:39,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,014 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:50:40,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-06-05 06:50:40,015 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,041 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:50:40,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 06:50:40,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:40,612 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 142 [2021-06-05 06:50:40,612 INFO L628 ElimStorePlain]: treesize reduction 31, result has 95.0 percent of original size [2021-06-05 06:50:40,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,640 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:50:40,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-06-05 06:50:40,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:40,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,666 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:50:40,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-06-05 06:50:40,668 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:40,928 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:50:40,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,957 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-05 06:50:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-06-05 06:50:40,958 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:40,983 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:50:40,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-06-05 06:50:40,987 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:41,439 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 122 [2021-06-05 06:50:41,439 INFO L628 ElimStorePlain]: treesize reduction 33, result has 93.4 percent of original size [2021-06-05 06:50:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:41,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:41,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-06-05 06:50:41,474 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:41,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:41,498 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-05 06:50:41,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-06-05 06:50:41,512 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:42,119 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2021-06-05 06:50:42,120 INFO L628 ElimStorePlain]: treesize reduction 40, result has 91.2 percent of original size [2021-06-05 06:50:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:42,145 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-05 06:50:42,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-06-05 06:50:42,147 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:42,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:50:42,169 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-05 06:50:42,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 06:50:42,172 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:50:42,353 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-06-05 06:50:42,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:50:42,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-06-05 06:50:42,368 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:422 [2021-06-05 06:50:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:42,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827074364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:42,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:42,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:50:42,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837936358] [2021-06-05 06:50:42,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:50:42,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:50:42,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:50:42,568 INFO L87 Difference]: Start difference. First operand 2360 states and 8118 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:45,370 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 06:50:45,554 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-05 06:50:47,939 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 105 DAG size of output: 91 [2021-06-05 06:50:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:48,403 INFO L93 Difference]: Finished difference Result 3258 states and 10844 transitions. [2021-06-05 06:50:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:50:48,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:50:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:48,408 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 06:50:48,408 INFO L226 Difference]: Without dead ends: 3228 [2021-06-05 06:50:48,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 5848.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1261, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:50:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-05 06:50:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2352. [2021-06-05 06:50:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 3.442364951084645) internal successors, (8093), 2351 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 8093 transitions. [2021-06-05 06:50:48,441 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 8093 transitions. Word has length 26 [2021-06-05 06:50:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:48,441 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 8093 transitions. [2021-06-05 06:50:48,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 8093 transitions. [2021-06-05 06:50:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:48,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:48,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:48,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:48,646 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:48,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-06-05 06:50:48,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:48,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894272812] [2021-06-05 06:50:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:48,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894272812] [2021-06-05 06:50:48,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894272812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:48,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319120394] [2021-06-05 06:50:48,692 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:48,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:50:48,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:50:48,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319120394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:48,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:48,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:50:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762126311] [2021-06-05 06:50:48,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:50:48,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:50:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:50:48,827 INFO L87 Difference]: Start difference. First operand 2352 states and 8093 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:49,639 INFO L93 Difference]: Finished difference Result 5410 states and 16973 transitions. [2021-06-05 06:50:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:50:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:49,646 INFO L225 Difference]: With dead ends: 5410 [2021-06-05 06:50:49,646 INFO L226 Difference]: Without dead ends: 5410 [2021-06-05 06:50:49,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:50:49,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2021-06-05 06:50:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 2548. [2021-06-05 06:50:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 3.486062033765214) internal successors, (8879), 2547 states have internal predecessors, (8879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 8879 transitions. [2021-06-05 06:50:49,692 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 8879 transitions. Word has length 28 [2021-06-05 06:50:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:49,692 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 8879 transitions. [2021-06-05 06:50:49,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 8879 transitions. [2021-06-05 06:50:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:49,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:49,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:49,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:49,895 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-06-05 06:50:49,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:49,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484137644] [2021-06-05 06:50:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:49,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484137644] [2021-06-05 06:50:49,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484137644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876873350] [2021-06-05 06:50:49,940 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:49,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:50:49,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:49,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:50:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:50,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876873350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:50,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:50,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:50:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057444013] [2021-06-05 06:50:50,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:50:50,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:50:50,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:50:50,105 INFO L87 Difference]: Start difference. First operand 2548 states and 8879 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:51,225 INFO L93 Difference]: Finished difference Result 7046 states and 21713 transitions. [2021-06-05 06:50:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:50:51,225 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:51,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:51,235 INFO L225 Difference]: With dead ends: 7046 [2021-06-05 06:50:51,235 INFO L226 Difference]: Without dead ends: 7046 [2021-06-05 06:50:51,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:50:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-06-05 06:50:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 2559. [2021-06-05 06:50:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2558 states have (on average 3.492181391712275) internal successors, (8933), 2558 states have internal predecessors, (8933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 8933 transitions. [2021-06-05 06:50:51,294 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 8933 transitions. Word has length 28 [2021-06-05 06:50:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:51,294 INFO L482 AbstractCegarLoop]: Abstraction has 2559 states and 8933 transitions. [2021-06-05 06:50:51,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 8933 transitions. [2021-06-05 06:50:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:51,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:51,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:51,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-06-05 06:50:51,499 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-06-05 06:50:51,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:51,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246252284] [2021-06-05 06:50:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:51,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:51,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246252284] [2021-06-05 06:50:51,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246252284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:51,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947528220] [2021-06-05 06:50:51,536 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:51,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:50:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:51,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:50:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947528220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:51,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:51,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:50:51,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223895601] [2021-06-05 06:50:51,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:50:51,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:51,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:50:51,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:50:51,654 INFO L87 Difference]: Start difference. First operand 2559 states and 8933 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:52,705 INFO L93 Difference]: Finished difference Result 6437 states and 20239 transitions. [2021-06-05 06:50:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:50:52,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:52,714 INFO L225 Difference]: With dead ends: 6437 [2021-06-05 06:50:52,714 INFO L226 Difference]: Without dead ends: 6437 [2021-06-05 06:50:52,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:50:52,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6437 states. [2021-06-05 06:50:52,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6437 to 2507. [2021-06-05 06:50:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 3.4720670391061454) internal successors, (8701), 2506 states have internal predecessors, (8701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 8701 transitions. [2021-06-05 06:50:52,772 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 8701 transitions. Word has length 28 [2021-06-05 06:50:52,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:52,772 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 8701 transitions. [2021-06-05 06:50:52,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:52,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 8701 transitions. [2021-06-05 06:50:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:52,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:52,775 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:52,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3903 [2021-06-05 06:50:52,975 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-06-05 06:50:52,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:52,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200985875] [2021-06-05 06:50:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:53,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200985875] [2021-06-05 06:50:53,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200985875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123429090] [2021-06-05 06:50:53,012 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:53,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:53,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:50:53,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:53,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123429090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:53,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:53,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:50:53,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566509755] [2021-06-05 06:50:53,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:50:53,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:53,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:50:53,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:50:53,121 INFO L87 Difference]: Start difference. First operand 2507 states and 8701 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:54,065 INFO L93 Difference]: Finished difference Result 5496 states and 17140 transitions. [2021-06-05 06:50:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:50:54,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:54,072 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 06:50:54,072 INFO L226 Difference]: Without dead ends: 5496 [2021-06-05 06:50:54,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 576.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:50:54,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-05 06:50:54,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 2522. [2021-06-05 06:50:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 3.4668782229274098) internal successors, (8740), 2521 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 8740 transitions. [2021-06-05 06:50:54,118 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 8740 transitions. Word has length 28 [2021-06-05 06:50:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:54,119 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 8740 transitions. [2021-06-05 06:50:54,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 8740 transitions. [2021-06-05 06:50:54,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:54,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:54,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:54,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:54,322 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:54,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:54,322 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 66 times [2021-06-05 06:50:54,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:54,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093079307] [2021-06-05 06:50:54,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:54,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:54,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093079307] [2021-06-05 06:50:54,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093079307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:54,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576158915] [2021-06-05 06:50:54,360 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:54,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:50:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:54,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:50:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:54,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576158915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:54,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:54,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:50:54,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524823065] [2021-06-05 06:50:54,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:50:54,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:54,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:50:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:50:54,465 INFO L87 Difference]: Start difference. First operand 2522 states and 8740 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:54,963 INFO L93 Difference]: Finished difference Result 4908 states and 15515 transitions. [2021-06-05 06:50:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:50:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:54,970 INFO L225 Difference]: With dead ends: 4908 [2021-06-05 06:50:54,970 INFO L226 Difference]: Without dead ends: 4908 [2021-06-05 06:50:54,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 286.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:50:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4908 states. [2021-06-05 06:50:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4908 to 2592. [2021-06-05 06:50:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 3.4515631030490157) internal successors, (8943), 2591 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 8943 transitions. [2021-06-05 06:50:55,014 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 8943 transitions. Word has length 28 [2021-06-05 06:50:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:55,014 INFO L482 AbstractCegarLoop]: Abstraction has 2592 states and 8943 transitions. [2021-06-05 06:50:55,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:55,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 8943 transitions. [2021-06-05 06:50:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:55,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:55,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:55,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3905 [2021-06-05 06:50:55,217 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-06-05 06:50:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:55,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110200988] [2021-06-05 06:50:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:50:55,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:55,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110200988] [2021-06-05 06:50:55,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110200988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:55,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429195423] [2021-06-05 06:50:55,243 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:55,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:50:55,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:50:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:50:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429195423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:55,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:55,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:50:55,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747430407] [2021-06-05 06:50:55,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:50:55,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:50:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:50:55,317 INFO L87 Difference]: Start difference. First operand 2592 states and 8943 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:55,474 INFO L93 Difference]: Finished difference Result 4133 states and 13562 transitions. [2021-06-05 06:50:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:50:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:55,479 INFO L225 Difference]: With dead ends: 4133 [2021-06-05 06:50:55,479 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 06:50:55,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:50:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 06:50:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 2922. [2021-06-05 06:50:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2922 states, 2921 states have (on average 3.501198219787744) internal successors, (10227), 2921 states have internal predecessors, (10227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2922 states to 2922 states and 10227 transitions. [2021-06-05 06:50:55,521 INFO L78 Accepts]: Start accepts. Automaton has 2922 states and 10227 transitions. Word has length 28 [2021-06-05 06:50:55,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:55,521 INFO L482 AbstractCegarLoop]: Abstraction has 2922 states and 10227 transitions. [2021-06-05 06:50:55,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2922 states and 10227 transitions. [2021-06-05 06:50:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:55,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:55,524 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:55,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3906,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:55,725 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-06-05 06:50:55,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:55,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167632476] [2021-06-05 06:50:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:55,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167632476] [2021-06-05 06:50:55,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167632476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468835041] [2021-06-05 06:50:55,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:55,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:50:55,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:50:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:55,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468835041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:55,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:55,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:50:55,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342197025] [2021-06-05 06:50:55,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:50:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:50:55,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:50:55,868 INFO L87 Difference]: Start difference. First operand 2922 states and 10227 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:56,416 INFO L93 Difference]: Finished difference Result 4714 states and 15191 transitions. [2021-06-05 06:50:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:50:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:56,423 INFO L225 Difference]: With dead ends: 4714 [2021-06-05 06:50:56,423 INFO L226 Difference]: Without dead ends: 4667 [2021-06-05 06:50:56,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:50:56,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-06-05 06:50:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3096. [2021-06-05 06:50:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 3.5150242326332797) internal successors, (10879), 3095 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 10879 transitions. [2021-06-05 06:50:56,475 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 10879 transitions. Word has length 28 [2021-06-05 06:50:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:56,475 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 10879 transitions. [2021-06-05 06:50:56,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 10879 transitions. [2021-06-05 06:50:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:56,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:56,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-06-05 06:50:56,680 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:56,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:56,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-06-05 06:50:56,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:56,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228312464] [2021-06-05 06:50:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:56,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228312464] [2021-06-05 06:50:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228312464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072720028] [2021-06-05 06:50:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:56,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:50:56,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:56,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:50:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:56,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072720028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:56,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:50:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224304477] [2021-06-05 06:50:56,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:50:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:50:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:50:56,847 INFO L87 Difference]: Start difference. First operand 3096 states and 10879 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:57,435 INFO L93 Difference]: Finished difference Result 5031 states and 15895 transitions. [2021-06-05 06:50:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:50:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:57,442 INFO L225 Difference]: With dead ends: 5031 [2021-06-05 06:50:57,442 INFO L226 Difference]: Without dead ends: 5005 [2021-06-05 06:50:57,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:50:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2021-06-05 06:50:57,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 3120. [2021-06-05 06:50:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 3.521000320615582) internal successors, (10982), 3119 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 10982 transitions. [2021-06-05 06:50:57,495 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 10982 transitions. Word has length 28 [2021-06-05 06:50:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:57,495 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 10982 transitions. [2021-06-05 06:50:57,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 10982 transitions. [2021-06-05 06:50:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:57,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:57,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:57,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3908 [2021-06-05 06:50:57,701 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-06-05 06:50:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:57,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994931536] [2021-06-05 06:50:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:57,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:57,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994931536] [2021-06-05 06:50:57,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994931536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:57,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135689549] [2021-06-05 06:50:57,752 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:57,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:50:57,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:57,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:50:57,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:57,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135689549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:57,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:57,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:50:57,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767667001] [2021-06-05 06:50:57,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:50:57,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:57,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:50:57,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:50:57,854 INFO L87 Difference]: Start difference. First operand 3120 states and 10982 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:58,467 INFO L93 Difference]: Finished difference Result 5035 states and 15933 transitions. [2021-06-05 06:50:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:50:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:58,474 INFO L225 Difference]: With dead ends: 5035 [2021-06-05 06:50:58,474 INFO L226 Difference]: Without dead ends: 5029 [2021-06-05 06:50:58,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:50:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2021-06-05 06:50:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 3123. [2021-06-05 06:50:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 3.5153747597693785) internal successors, (10975), 3122 states have internal predecessors, (10975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 10975 transitions. [2021-06-05 06:50:58,527 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 10975 transitions. Word has length 28 [2021-06-05 06:50:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:58,527 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 10975 transitions. [2021-06-05 06:50:58,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 10975 transitions. [2021-06-05 06:50:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:58,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:58,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:58,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:58,737 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:58,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-06-05 06:50:58,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:58,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881379726] [2021-06-05 06:50:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:58,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881379726] [2021-06-05 06:50:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881379726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598735936] [2021-06-05 06:50:58,768 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:58,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:50:58,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:50:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:50:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:50:58,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598735936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:58,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:58,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:50:58,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344461859] [2021-06-05 06:50:58,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:50:58,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:58,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:50:58,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:50:58,859 INFO L87 Difference]: Start difference. First operand 3123 states and 10975 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:59,340 INFO L93 Difference]: Finished difference Result 5805 states and 18700 transitions. [2021-06-05 06:50:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:50:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:59,348 INFO L225 Difference]: With dead ends: 5805 [2021-06-05 06:50:59,348 INFO L226 Difference]: Without dead ends: 5722 [2021-06-05 06:50:59,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:50:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5722 states. [2021-06-05 06:50:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5722 to 3270. [2021-06-05 06:50:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 3.5460385438972164) internal successors, (11592), 3269 states have internal predecessors, (11592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 11592 transitions. [2021-06-05 06:50:59,431 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 11592 transitions. Word has length 28 [2021-06-05 06:50:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:59,432 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 11592 transitions. [2021-06-05 06:50:59,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 11592 transitions. [2021-06-05 06:50:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:59,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:59,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:50:59,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3910,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:59,636 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:50:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:50:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-06-05 06:50:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:50:59,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999186373] [2021-06-05 06:50:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:50:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:50:59,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:50:59,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999186373] [2021-06-05 06:50:59,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999186373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:59,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30221103] [2021-06-05 06:50:59,661 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:50:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:50:59,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:50:59,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:50:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:50:59,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30221103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:50:59,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:50:59,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 06:50:59,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849647433] [2021-06-05 06:50:59,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:50:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:50:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:50:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:50:59,746 INFO L87 Difference]: Start difference. First operand 3270 states and 11592 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:50:59,890 INFO L93 Difference]: Finished difference Result 4551 states and 15064 transitions. [2021-06-05 06:50:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:50:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:50:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:50:59,896 INFO L225 Difference]: With dead ends: 4551 [2021-06-05 06:50:59,896 INFO L226 Difference]: Without dead ends: 4551 [2021-06-05 06:50:59,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:50:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-05 06:50:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3038. [2021-06-05 06:50:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 3.5284820546592033) internal successors, (10716), 3037 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 10716 transitions. [2021-06-05 06:50:59,941 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 10716 transitions. Word has length 28 [2021-06-05 06:50:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:50:59,941 INFO L482 AbstractCegarLoop]: Abstraction has 3038 states and 10716 transitions. [2021-06-05 06:50:59,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:50:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 10716 transitions. [2021-06-05 06:50:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:50:59,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:50:59,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:00,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 06:51:00,145 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:00,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-06-05 06:51:00,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:00,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288073460] [2021-06-05 06:51:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:00,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288073460] [2021-06-05 06:51:00,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288073460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:00,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867282855] [2021-06-05 06:51:00,183 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:00,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:00,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:00,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:00,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867282855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:00,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:00,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:51:00,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288111855] [2021-06-05 06:51:00,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:00,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:00,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:00,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:00,278 INFO L87 Difference]: Start difference. First operand 3038 states and 10716 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:00,851 INFO L93 Difference]: Finished difference Result 6432 states and 20472 transitions. [2021-06-05 06:51:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:51:00,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:00,860 INFO L225 Difference]: With dead ends: 6432 [2021-06-05 06:51:00,860 INFO L226 Difference]: Without dead ends: 6432 [2021-06-05 06:51:00,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 340.6ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:51:00,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-06-05 06:51:00,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 3056. [2021-06-05 06:51:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3055 states have (on average 3.528314238952537) internal successors, (10779), 3055 states have internal predecessors, (10779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 10779 transitions. [2021-06-05 06:51:00,921 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 10779 transitions. Word has length 28 [2021-06-05 06:51:00,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:00,921 INFO L482 AbstractCegarLoop]: Abstraction has 3056 states and 10779 transitions. [2021-06-05 06:51:00,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 10779 transitions. [2021-06-05 06:51:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:00,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:00,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:01,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3912 [2021-06-05 06:51:01,126 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:01,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:01,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-06-05 06:51:01,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:01,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024477121] [2021-06-05 06:51:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:01,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:01,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024477121] [2021-06-05 06:51:01,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024477121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:01,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024441626] [2021-06-05 06:51:01,157 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:01,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:51:01,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:01,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024441626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:01,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:01,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:51:01,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150097451] [2021-06-05 06:51:01,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:01,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:01,247 INFO L87 Difference]: Start difference. First operand 3056 states and 10779 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:01,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:01,955 INFO L93 Difference]: Finished difference Result 6687 states and 21252 transitions. [2021-06-05 06:51:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:51:01,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:01,964 INFO L225 Difference]: With dead ends: 6687 [2021-06-05 06:51:01,965 INFO L226 Difference]: Without dead ends: 6687 [2021-06-05 06:51:01,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:51:01,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6687 states. [2021-06-05 06:51:02,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6687 to 3150. [2021-06-05 06:51:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.520482692918387) internal successors, (11086), 3149 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11086 transitions. [2021-06-05 06:51:02,029 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11086 transitions. Word has length 28 [2021-06-05 06:51:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:02,029 INFO L482 AbstractCegarLoop]: Abstraction has 3150 states and 11086 transitions. [2021-06-05 06:51:02,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11086 transitions. [2021-06-05 06:51:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:02,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:02,033 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:02,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3913 [2021-06-05 06:51:02,245 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:02,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-06-05 06:51:02,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:02,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024456054] [2021-06-05 06:51:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024456054] [2021-06-05 06:51:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024456054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719922726] [2021-06-05 06:51:02,274 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:02,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:02,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:02,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:02,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719922726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:02,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:02,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:51:02,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193862918] [2021-06-05 06:51:02,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:02,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:02,359 INFO L87 Difference]: Start difference. First operand 3150 states and 11086 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:02,889 INFO L93 Difference]: Finished difference Result 6847 states and 21782 transitions. [2021-06-05 06:51:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:51:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:02,899 INFO L225 Difference]: With dead ends: 6847 [2021-06-05 06:51:02,899 INFO L226 Difference]: Without dead ends: 6811 [2021-06-05 06:51:02,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:51:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6811 states. [2021-06-05 06:51:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6811 to 3552. [2021-06-05 06:51:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 3.5457617572514786) internal successors, (12591), 3551 states have internal predecessors, (12591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 12591 transitions. [2021-06-05 06:51:03,003 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 12591 transitions. Word has length 28 [2021-06-05 06:51:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:03,003 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 12591 transitions. [2021-06-05 06:51:03,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 12591 transitions. [2021-06-05 06:51:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:03,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:03,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:03,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:03,208 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:03,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:03,209 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-06-05 06:51:03,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:03,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987989724] [2021-06-05 06:51:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:03,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987989724] [2021-06-05 06:51:03,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987989724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:03,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704699071] [2021-06-05 06:51:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:03,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:03,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:03,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:03,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:03,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704699071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:03,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:03,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:51:03,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475087159] [2021-06-05 06:51:03,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:03,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:03,328 INFO L87 Difference]: Start difference. First operand 3552 states and 12591 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:03,868 INFO L93 Difference]: Finished difference Result 7020 states and 22256 transitions. [2021-06-05 06:51:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:51:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:03,879 INFO L225 Difference]: With dead ends: 7020 [2021-06-05 06:51:03,879 INFO L226 Difference]: Without dead ends: 7020 [2021-06-05 06:51:03,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:51:03,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2021-06-05 06:51:03,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 3265. [2021-06-05 06:51:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3264 states have (on average 3.5082720588235294) internal successors, (11451), 3264 states have internal predecessors, (11451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 11451 transitions. [2021-06-05 06:51:03,949 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 11451 transitions. Word has length 28 [2021-06-05 06:51:03,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:03,950 INFO L482 AbstractCegarLoop]: Abstraction has 3265 states and 11451 transitions. [2021-06-05 06:51:03,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:03,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 11451 transitions. [2021-06-05 06:51:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:03,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:03,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:04,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3915 [2021-06-05 06:51:04,154 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:04,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-06-05 06:51:04,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:04,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939388498] [2021-06-05 06:51:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939388498] [2021-06-05 06:51:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939388498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982528278] [2021-06-05 06:51:04,194 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:04,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:51:04,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:04,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:04,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982528278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:04,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:04,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:51:04,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878336766] [2021-06-05 06:51:04,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:04,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:04,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:04,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:04,300 INFO L87 Difference]: Start difference. First operand 3265 states and 11451 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:04,921 INFO L93 Difference]: Finished difference Result 6180 states and 19991 transitions. [2021-06-05 06:51:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:51:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:04,929 INFO L225 Difference]: With dead ends: 6180 [2021-06-05 06:51:04,929 INFO L226 Difference]: Without dead ends: 6176 [2021-06-05 06:51:04,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:51:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-05 06:51:04,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 3025. [2021-06-05 06:51:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 3.5327380952380953) internal successors, (10683), 3024 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 10683 transitions. [2021-06-05 06:51:04,984 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 10683 transitions. Word has length 28 [2021-06-05 06:51:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:04,984 INFO L482 AbstractCegarLoop]: Abstraction has 3025 states and 10683 transitions. [2021-06-05 06:51:04,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 10683 transitions. [2021-06-05 06:51:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:04,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:04,987 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:05,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3916 [2021-06-05 06:51:05,188 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:05,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-06-05 06:51:05,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:05,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631537395] [2021-06-05 06:51:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:05,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:05,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631537395] [2021-06-05 06:51:05,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631537395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:05,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904684587] [2021-06-05 06:51:05,225 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:05,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:05,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904684587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:05,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:05,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:51:05,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794215818] [2021-06-05 06:51:05,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:05,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:05,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:05,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:05,330 INFO L87 Difference]: Start difference. First operand 3025 states and 10683 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:06,249 INFO L93 Difference]: Finished difference Result 9433 states and 30825 transitions. [2021-06-05 06:51:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:51:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:06,264 INFO L225 Difference]: With dead ends: 9433 [2021-06-05 06:51:06,264 INFO L226 Difference]: Without dead ends: 9433 [2021-06-05 06:51:06,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:51:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-06-05 06:51:06,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 3201. [2021-06-05 06:51:06,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.6003125) internal successors, (11521), 3200 states have internal predecessors, (11521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11521 transitions. [2021-06-05 06:51:06,353 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11521 transitions. Word has length 28 [2021-06-05 06:51:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:06,353 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11521 transitions. [2021-06-05 06:51:06,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11521 transitions. [2021-06-05 06:51:06,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:06,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:06,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:06,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3917 [2021-06-05 06:51:06,558 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:06,558 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-06-05 06:51:06,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:06,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153293005] [2021-06-05 06:51:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:06,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:06,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153293005] [2021-06-05 06:51:06,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153293005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:06,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328996054] [2021-06-05 06:51:06,588 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:06,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:06,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:06,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:06,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:06,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328996054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:06,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:06,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:51:06,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992871090] [2021-06-05 06:51:06,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:06,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:06,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:06,714 INFO L87 Difference]: Start difference. First operand 3201 states and 11521 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:07,622 INFO L93 Difference]: Finished difference Result 9262 states and 30360 transitions. [2021-06-05 06:51:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:51:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:07,638 INFO L225 Difference]: With dead ends: 9262 [2021-06-05 06:51:07,639 INFO L226 Difference]: Without dead ends: 9262 [2021-06-05 06:51:07,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 533.4ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 06:51:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9262 states. [2021-06-05 06:51:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9262 to 3173. [2021-06-05 06:51:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 3172 states have (on average 3.5851197982345524) internal successors, (11372), 3172 states have internal predecessors, (11372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:07,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 11372 transitions. [2021-06-05 06:51:07,729 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 11372 transitions. Word has length 28 [2021-06-05 06:51:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:07,729 INFO L482 AbstractCegarLoop]: Abstraction has 3173 states and 11372 transitions. [2021-06-05 06:51:07,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 11372 transitions. [2021-06-05 06:51:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:07,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:07,734 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:07,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3918 [2021-06-05 06:51:07,934 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:07,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-06-05 06:51:07,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:07,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131402756] [2021-06-05 06:51:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:07,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:07,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131402756] [2021-06-05 06:51:07,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131402756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:07,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265874190] [2021-06-05 06:51:07,970 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:07,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:51:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:08,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265874190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:08,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:08,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:51:08,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060011319] [2021-06-05 06:51:08,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:08,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:08,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:08,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:08,073 INFO L87 Difference]: Start difference. First operand 3173 states and 11372 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:08,928 INFO L93 Difference]: Finished difference Result 8699 states and 27601 transitions. [2021-06-05 06:51:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:51:08,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:08,942 INFO L225 Difference]: With dead ends: 8699 [2021-06-05 06:51:08,942 INFO L226 Difference]: Without dead ends: 8699 [2021-06-05 06:51:08,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 450.1ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:51:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8699 states. [2021-06-05 06:51:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8699 to 3193. [2021-06-05 06:51:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 3192 states have (on average 3.588345864661654) internal successors, (11454), 3192 states have internal predecessors, (11454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 11454 transitions. [2021-06-05 06:51:09,025 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 11454 transitions. Word has length 28 [2021-06-05 06:51:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:09,025 INFO L482 AbstractCegarLoop]: Abstraction has 3193 states and 11454 transitions. [2021-06-05 06:51:09,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 11454 transitions. [2021-06-05 06:51:09,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:09,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:09,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:09,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-06-05 06:51:09,229 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:09,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:09,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-06-05 06:51:09,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:09,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378166820] [2021-06-05 06:51:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:09,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378166820] [2021-06-05 06:51:09,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378166820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547135143] [2021-06-05 06:51:09,261 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:09,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:09,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:09,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:09,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547135143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:09,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:09,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:51:09,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903261719] [2021-06-05 06:51:09,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:09,352 INFO L87 Difference]: Start difference. First operand 3193 states and 11454 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:10,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:10,147 INFO L93 Difference]: Finished difference Result 8208 states and 26413 transitions. [2021-06-05 06:51:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:51:10,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:10,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:10,159 INFO L225 Difference]: With dead ends: 8208 [2021-06-05 06:51:10,159 INFO L226 Difference]: Without dead ends: 8200 [2021-06-05 06:51:10,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:51:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-06-05 06:51:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 3175. [2021-06-05 06:51:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.584436042848141) internal successors, (11377), 3174 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11377 transitions. [2021-06-05 06:51:10,255 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11377 transitions. Word has length 28 [2021-06-05 06:51:10,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:10,255 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11377 transitions. [2021-06-05 06:51:10,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11377 transitions. [2021-06-05 06:51:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:10,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:10,259 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:10,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:10,459 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-06-05 06:51:10,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:10,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358473231] [2021-06-05 06:51:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:10,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:10,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358473231] [2021-06-05 06:51:10,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358473231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:10,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665655626] [2021-06-05 06:51:10,490 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:10,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:51:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:10,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:10,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665655626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:10,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:10,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:51:10,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200361809] [2021-06-05 06:51:10,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:10,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:10,597 INFO L87 Difference]: Start difference. First operand 3175 states and 11377 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:11,447 INFO L93 Difference]: Finished difference Result 8126 states and 26160 transitions. [2021-06-05 06:51:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 06:51:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:11,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:11,459 INFO L225 Difference]: With dead ends: 8126 [2021-06-05 06:51:11,460 INFO L226 Difference]: Without dead ends: 8126 [2021-06-05 06:51:11,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:51:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-05 06:51:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 3191. [2021-06-05 06:51:11,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 3.5865203761755486) internal successors, (11441), 3190 states have internal predecessors, (11441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 11441 transitions. [2021-06-05 06:51:11,534 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 11441 transitions. Word has length 28 [2021-06-05 06:51:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:11,534 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 11441 transitions. [2021-06-05 06:51:11,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 11441 transitions. [2021-06-05 06:51:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:11,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:11,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:11,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3921 [2021-06-05 06:51:11,739 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-06-05 06:51:11,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:11,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065366943] [2021-06-05 06:51:11,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:11,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:11,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065366943] [2021-06-05 06:51:11,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065366943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:11,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865906843] [2021-06-05 06:51:11,775 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:11,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:51:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:11,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865906843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:11,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:11,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:51:11,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704501551] [2021-06-05 06:51:11,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:11,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:11,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:11,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:11,894 INFO L87 Difference]: Start difference. First operand 3191 states and 11441 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:12,756 INFO L93 Difference]: Finished difference Result 7794 states and 25376 transitions. [2021-06-05 06:51:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:51:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:12,769 INFO L225 Difference]: With dead ends: 7794 [2021-06-05 06:51:12,769 INFO L226 Difference]: Without dead ends: 7786 [2021-06-05 06:51:12,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:51:12,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7786 states. [2021-06-05 06:51:12,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7786 to 2948. [2021-06-05 06:51:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 3.508313539192399) internal successors, (10339), 2947 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 10339 transitions. [2021-06-05 06:51:12,842 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 10339 transitions. Word has length 28 [2021-06-05 06:51:12,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:12,843 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 10339 transitions. [2021-06-05 06:51:12,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 10339 transitions. [2021-06-05 06:51:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:12,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:12,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:13,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3922,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:13,046 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:13,047 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-06-05 06:51:13,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:13,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848489732] [2021-06-05 06:51:13,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:13,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848489732] [2021-06-05 06:51:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848489732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359639334] [2021-06-05 06:51:13,078 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:13,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:13,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359639334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:13,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:13,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:51:13,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551202290] [2021-06-05 06:51:13,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:13,184 INFO L87 Difference]: Start difference. First operand 2948 states and 10339 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:13,940 INFO L93 Difference]: Finished difference Result 6003 states and 19292 transitions. [2021-06-05 06:51:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:51:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:13,948 INFO L225 Difference]: With dead ends: 6003 [2021-06-05 06:51:13,949 INFO L226 Difference]: Without dead ends: 6003 [2021-06-05 06:51:13,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:51:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6003 states. [2021-06-05 06:51:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6003 to 2960. [2021-06-05 06:51:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2960 states, 2959 states have (on average 3.5069280162216967) internal successors, (10377), 2959 states have internal predecessors, (10377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:13,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2960 states to 2960 states and 10377 transitions. [2021-06-05 06:51:13,999 INFO L78 Accepts]: Start accepts. Automaton has 2960 states and 10377 transitions. Word has length 28 [2021-06-05 06:51:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:13,999 INFO L482 AbstractCegarLoop]: Abstraction has 2960 states and 10377 transitions. [2021-06-05 06:51:13,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:13,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2960 states and 10377 transitions. [2021-06-05 06:51:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:14,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:14,003 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:14,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3923 [2021-06-05 06:51:14,203 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-06-05 06:51:14,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:14,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330487177] [2021-06-05 06:51:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:14,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:14,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330487177] [2021-06-05 06:51:14,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330487177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:14,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887285378] [2021-06-05 06:51:14,235 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:14,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:14,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:14,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887285378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:14,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:14,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:51:14,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645190106] [2021-06-05 06:51:14,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:14,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:14,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:14,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:14,350 INFO L87 Difference]: Start difference. First operand 2960 states and 10377 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:15,324 INFO L93 Difference]: Finished difference Result 6789 states and 21302 transitions. [2021-06-05 06:51:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:51:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:15,334 INFO L225 Difference]: With dead ends: 6789 [2021-06-05 06:51:15,334 INFO L226 Difference]: Without dead ends: 6789 [2021-06-05 06:51:15,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:51:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6789 states. [2021-06-05 06:51:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6789 to 3026. [2021-06-05 06:51:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3026 states, 3025 states have (on average 3.5021487603305785) internal successors, (10594), 3025 states have internal predecessors, (10594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3026 states to 3026 states and 10594 transitions. [2021-06-05 06:51:15,399 INFO L78 Accepts]: Start accepts. Automaton has 3026 states and 10594 transitions. Word has length 28 [2021-06-05 06:51:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:15,399 INFO L482 AbstractCegarLoop]: Abstraction has 3026 states and 10594 transitions. [2021-06-05 06:51:15,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3026 states and 10594 transitions. [2021-06-05 06:51:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:15,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:15,402 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:15,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3924,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:15,603 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-06-05 06:51:15,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:15,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439288895] [2021-06-05 06:51:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:15,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:15,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439288895] [2021-06-05 06:51:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439288895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176027680] [2021-06-05 06:51:15,634 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:51:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:15,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176027680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:15,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:15,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:51:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927489797] [2021-06-05 06:51:15,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:15,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:15,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:15,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:15,764 INFO L87 Difference]: Start difference. First operand 3026 states and 10594 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:16,645 INFO L93 Difference]: Finished difference Result 6345 states and 20138 transitions. [2021-06-05 06:51:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:51:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:16,654 INFO L225 Difference]: With dead ends: 6345 [2021-06-05 06:51:16,655 INFO L226 Difference]: Without dead ends: 6341 [2021-06-05 06:51:16,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 559.7ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:51:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2021-06-05 06:51:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 2952. [2021-06-05 06:51:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.4984750931887496) internal successors, (10324), 2951 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:16,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10324 transitions. [2021-06-05 06:51:16,716 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10324 transitions. Word has length 28 [2021-06-05 06:51:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:16,716 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10324 transitions. [2021-06-05 06:51:16,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10324 transitions. [2021-06-05 06:51:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:16,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:16,719 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:16,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3925 [2021-06-05 06:51:16,921 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:16,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 67 times [2021-06-05 06:51:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:16,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371607334] [2021-06-05 06:51:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:16,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:16,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:16,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371607334] [2021-06-05 06:51:16,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371607334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:16,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025285554] [2021-06-05 06:51:16,958 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:17,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025285554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:17,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:17,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:51:17,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367445811] [2021-06-05 06:51:17,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:17,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:17,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:17,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:17,048 INFO L87 Difference]: Start difference. First operand 2952 states and 10324 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:17,584 INFO L93 Difference]: Finished difference Result 5472 states and 17679 transitions. [2021-06-05 06:51:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:51:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:17,592 INFO L225 Difference]: With dead ends: 5472 [2021-06-05 06:51:17,592 INFO L226 Difference]: Without dead ends: 5472 [2021-06-05 06:51:17,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:51:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-05 06:51:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 2952. [2021-06-05 06:51:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 2951 states have (on average 3.5005083022704166) internal successors, (10330), 2951 states have internal predecessors, (10330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 10330 transitions. [2021-06-05 06:51:17,649 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 10330 transitions. Word has length 28 [2021-06-05 06:51:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:17,650 INFO L482 AbstractCegarLoop]: Abstraction has 2952 states and 10330 transitions. [2021-06-05 06:51:17,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 10330 transitions. [2021-06-05 06:51:17,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:17,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:17,653 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:17,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-06-05 06:51:17,854 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:17,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 68 times [2021-06-05 06:51:17,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:17,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311032636] [2021-06-05 06:51:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:17,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311032636] [2021-06-05 06:51:17,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311032636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565565259] [2021-06-05 06:51:17,899 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:17,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:17,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:17,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565565259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:17,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:17,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:51:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525160183] [2021-06-05 06:51:17,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:17,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:17,998 INFO L87 Difference]: Start difference. First operand 2952 states and 10330 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:18,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:18,676 INFO L93 Difference]: Finished difference Result 5809 states and 18633 transitions. [2021-06-05 06:51:18,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:51:18,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:18,684 INFO L225 Difference]: With dead ends: 5809 [2021-06-05 06:51:18,685 INFO L226 Difference]: Without dead ends: 5809 [2021-06-05 06:51:18,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:51:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5809 states. [2021-06-05 06:51:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5809 to 2943. [2021-06-05 06:51:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 3.500679809653297) internal successors, (10299), 2942 states have internal predecessors, (10299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 10299 transitions. [2021-06-05 06:51:18,739 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 10299 transitions. Word has length 28 [2021-06-05 06:51:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:18,739 INFO L482 AbstractCegarLoop]: Abstraction has 2943 states and 10299 transitions. [2021-06-05 06:51:18,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:18,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 10299 transitions. [2021-06-05 06:51:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:18,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:18,742 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:18,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3927 [2021-06-05 06:51:18,945 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 69 times [2021-06-05 06:51:18,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:18,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060986249] [2021-06-05 06:51:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:18,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:18,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060986249] [2021-06-05 06:51:18,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060986249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:18,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501056906] [2021-06-05 06:51:18,990 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:19,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:51:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:19,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501056906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:19,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:19,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:51:19,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893361072] [2021-06-05 06:51:19,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:19,080 INFO L87 Difference]: Start difference. First operand 2943 states and 10299 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:19,880 INFO L93 Difference]: Finished difference Result 6283 states and 19914 transitions. [2021-06-05 06:51:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:51:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:19,889 INFO L225 Difference]: With dead ends: 6283 [2021-06-05 06:51:19,889 INFO L226 Difference]: Without dead ends: 6283 [2021-06-05 06:51:19,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:51:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2021-06-05 06:51:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 3003. [2021-06-05 06:51:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.4966688874083944) internal successors, (10497), 3002 states have internal predecessors, (10497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10497 transitions. [2021-06-05 06:51:19,945 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10497 transitions. Word has length 28 [2021-06-05 06:51:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:19,945 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 10497 transitions. [2021-06-05 06:51:19,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10497 transitions. [2021-06-05 06:51:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:19,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:19,949 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:20,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3928 [2021-06-05 06:51:20,153 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 70 times [2021-06-05 06:51:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636318914] [2021-06-05 06:51:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:20,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:20,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636318914] [2021-06-05 06:51:20,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636318914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:20,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570082397] [2021-06-05 06:51:20,184 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:20,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:20,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:20,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570082397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:20,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:20,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:51:20,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167894998] [2021-06-05 06:51:20,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:20,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:20,286 INFO L87 Difference]: Start difference. First operand 3003 states and 10497 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:20,769 INFO L93 Difference]: Finished difference Result 7087 states and 23881 transitions. [2021-06-05 06:51:20,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:51:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:20,779 INFO L225 Difference]: With dead ends: 7087 [2021-06-05 06:51:20,779 INFO L226 Difference]: Without dead ends: 7087 [2021-06-05 06:51:20,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:51:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2021-06-05 06:51:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 4173. [2021-06-05 06:51:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.6116970278044103) internal successors, (15068), 4172 states have internal predecessors, (15068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 15068 transitions. [2021-06-05 06:51:20,856 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 15068 transitions. Word has length 28 [2021-06-05 06:51:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 15068 transitions. [2021-06-05 06:51:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 15068 transitions. [2021-06-05 06:51:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:20,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:20,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:21,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3929 [2021-06-05 06:51:21,062 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:21,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 71 times [2021-06-05 06:51:21,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:21,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825438369] [2021-06-05 06:51:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:21,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825438369] [2021-06-05 06:51:21,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825438369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:21,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204187119] [2021-06-05 06:51:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:21,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:51:21,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204187119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:21,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:21,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:51:21,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28849652] [2021-06-05 06:51:21,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:21,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:21,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:21,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:21,183 INFO L87 Difference]: Start difference. First operand 4173 states and 15068 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:21,935 INFO L93 Difference]: Finished difference Result 7520 states and 25447 transitions. [2021-06-05 06:51:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:51:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:21,946 INFO L225 Difference]: With dead ends: 7520 [2021-06-05 06:51:21,946 INFO L226 Difference]: Without dead ends: 7516 [2021-06-05 06:51:21,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:51:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-06-05 06:51:22,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 4065. [2021-06-05 06:51:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.6205708661417324) internal successors, (14714), 4064 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14714 transitions. [2021-06-05 06:51:22,021 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14714 transitions. Word has length 28 [2021-06-05 06:51:22,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:22,021 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14714 transitions. [2021-06-05 06:51:22,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14714 transitions. [2021-06-05 06:51:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:22,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:22,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:22,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3930,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:22,226 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:22,226 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-06-05 06:51:22,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:22,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464226252] [2021-06-05 06:51:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:22,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:22,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464226252] [2021-06-05 06:51:22,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464226252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:22,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352442057] [2021-06-05 06:51:22,251 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:22,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:22,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:22,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:22,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352442057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:22,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:22,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:51:22,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808995539] [2021-06-05 06:51:22,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:22,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:22,347 INFO L87 Difference]: Start difference. First operand 4065 states and 14714 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:23,093 INFO L93 Difference]: Finished difference Result 8329 states and 27951 transitions. [2021-06-05 06:51:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:51:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:23,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:23,106 INFO L225 Difference]: With dead ends: 8329 [2021-06-05 06:51:23,106 INFO L226 Difference]: Without dead ends: 8320 [2021-06-05 06:51:23,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:23,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8320 states. [2021-06-05 06:51:23,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8320 to 4505. [2021-06-05 06:51:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 3.70892539964476) internal successors, (16705), 4504 states have internal predecessors, (16705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 16705 transitions. [2021-06-05 06:51:23,196 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 16705 transitions. Word has length 28 [2021-06-05 06:51:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:23,196 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 16705 transitions. [2021-06-05 06:51:23,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:23,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 16705 transitions. [2021-06-05 06:51:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:23,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:23,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:23,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:23,403 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-06-05 06:51:23,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:23,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375399357] [2021-06-05 06:51:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:23,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:23,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375399357] [2021-06-05 06:51:23,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375399357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:23,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262765741] [2021-06-05 06:51:23,431 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:23,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:23,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:23,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:23,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262765741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:23,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:23,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:51:23,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111874689] [2021-06-05 06:51:23,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:23,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:23,524 INFO L87 Difference]: Start difference. First operand 4505 states and 16705 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:24,269 INFO L93 Difference]: Finished difference Result 8622 states and 28858 transitions. [2021-06-05 06:51:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:51:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:24,283 INFO L225 Difference]: With dead ends: 8622 [2021-06-05 06:51:24,284 INFO L226 Difference]: Without dead ends: 8622 [2021-06-05 06:51:24,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2021-06-05 06:51:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 4525. [2021-06-05 06:51:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4525 states, 4524 states have (on average 3.6965075154730327) internal successors, (16723), 4524 states have internal predecessors, (16723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4525 states to 4525 states and 16723 transitions. [2021-06-05 06:51:24,378 INFO L78 Accepts]: Start accepts. Automaton has 4525 states and 16723 transitions. Word has length 28 [2021-06-05 06:51:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:24,378 INFO L482 AbstractCegarLoop]: Abstraction has 4525 states and 16723 transitions. [2021-06-05 06:51:24,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4525 states and 16723 transitions. [2021-06-05 06:51:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:24,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:24,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:24,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:24,584 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:24,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-06-05 06:51:24,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:24,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050943646] [2021-06-05 06:51:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:24,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050943646] [2021-06-05 06:51:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050943646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823160632] [2021-06-05 06:51:24,616 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:24,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:51:24,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:24,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:24,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823160632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:24,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:24,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:51:24,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020366030] [2021-06-05 06:51:24,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:24,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:24,700 INFO L87 Difference]: Start difference. First operand 4525 states and 16723 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:25,080 INFO L93 Difference]: Finished difference Result 8054 states and 28373 transitions. [2021-06-05 06:51:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:51:25,081 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:25,094 INFO L225 Difference]: With dead ends: 8054 [2021-06-05 06:51:25,094 INFO L226 Difference]: Without dead ends: 7950 [2021-06-05 06:51:25,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:51:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-06-05 06:51:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 5973. [2021-06-05 06:51:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5973 states, 5972 states have (on average 3.7582049564634965) internal successors, (22444), 5972 states have internal predecessors, (22444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5973 states to 5973 states and 22444 transitions. [2021-06-05 06:51:25,197 INFO L78 Accepts]: Start accepts. Automaton has 5973 states and 22444 transitions. Word has length 28 [2021-06-05 06:51:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:25,197 INFO L482 AbstractCegarLoop]: Abstraction has 5973 states and 22444 transitions. [2021-06-05 06:51:25,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 5973 states and 22444 transitions. [2021-06-05 06:51:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:25,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:25,205 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:25,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-05 06:51:25,405 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-06-05 06:51:25,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:25,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795386579] [2021-06-05 06:51:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:25,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:25,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795386579] [2021-06-05 06:51:25,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795386579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:25,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855674109] [2021-06-05 06:51:25,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:51:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855674109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:51:25,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836839701] [2021-06-05 06:51:25,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:51:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:25,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:51:25,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:51:25,498 INFO L87 Difference]: Start difference. First operand 5973 states and 22444 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:25,658 INFO L93 Difference]: Finished difference Result 8289 states and 29168 transitions. [2021-06-05 06:51:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:51:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:25,671 INFO L225 Difference]: With dead ends: 8289 [2021-06-05 06:51:25,672 INFO L226 Difference]: Without dead ends: 8289 [2021-06-05 06:51:25,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:51:25,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-05 06:51:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 6119. [2021-06-05 06:51:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6119 states, 6118 states have (on average 3.7355344883949004) internal successors, (22854), 6118 states have internal predecessors, (22854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6119 states to 6119 states and 22854 transitions. [2021-06-05 06:51:25,804 INFO L78 Accepts]: Start accepts. Automaton has 6119 states and 22854 transitions. Word has length 28 [2021-06-05 06:51:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:25,804 INFO L482 AbstractCegarLoop]: Abstraction has 6119 states and 22854 transitions. [2021-06-05 06:51:25,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6119 states and 22854 transitions. [2021-06-05 06:51:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:25,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:25,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:26,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3934,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:26,017 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-06-05 06:51:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:26,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47972601] [2021-06-05 06:51:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:26,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:26,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47972601] [2021-06-05 06:51:26,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47972601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:26,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620401785] [2021-06-05 06:51:26,053 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:26,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:26,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:26,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:26,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:26,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620401785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:26,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:26,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:51:26,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872339592] [2021-06-05 06:51:26,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:26,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:26,132 INFO L87 Difference]: Start difference. First operand 6119 states and 22854 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:26,773 INFO L93 Difference]: Finished difference Result 12663 states and 44044 transitions. [2021-06-05 06:51:26,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:51:26,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:26,796 INFO L225 Difference]: With dead ends: 12663 [2021-06-05 06:51:26,796 INFO L226 Difference]: Without dead ends: 12663 [2021-06-05 06:51:26,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:51:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12663 states. [2021-06-05 06:51:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12663 to 6788. [2021-06-05 06:51:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6788 states, 6787 states have (on average 3.7501105053779282) internal successors, (25452), 6787 states have internal predecessors, (25452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6788 states to 6788 states and 25452 transitions. [2021-06-05 06:51:26,944 INFO L78 Accepts]: Start accepts. Automaton has 6788 states and 25452 transitions. Word has length 28 [2021-06-05 06:51:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:26,945 INFO L482 AbstractCegarLoop]: Abstraction has 6788 states and 25452 transitions. [2021-06-05 06:51:26,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6788 states and 25452 transitions. [2021-06-05 06:51:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:26,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:26,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:27,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3935 [2021-06-05 06:51:27,155 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-06-05 06:51:27,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:27,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271972633] [2021-06-05 06:51:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:27,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:27,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271972633] [2021-06-05 06:51:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271972633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:27,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177234788] [2021-06-05 06:51:27,185 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:27,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:51:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:27,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:27,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177234788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:27,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:27,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:51:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851777450] [2021-06-05 06:51:27,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:27,264 INFO L87 Difference]: Start difference. First operand 6788 states and 25452 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:27,873 INFO L93 Difference]: Finished difference Result 12824 states and 44637 transitions. [2021-06-05 06:51:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:51:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:27,896 INFO L225 Difference]: With dead ends: 12824 [2021-06-05 06:51:27,896 INFO L226 Difference]: Without dead ends: 12824 [2021-06-05 06:51:27,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:51:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-06-05 06:51:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7036. [2021-06-05 06:51:28,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7035 states have (on average 3.729637526652452) internal successors, (26238), 7035 states have internal predecessors, (26238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 26238 transitions. [2021-06-05 06:51:28,051 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 26238 transitions. Word has length 28 [2021-06-05 06:51:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:28,052 INFO L482 AbstractCegarLoop]: Abstraction has 7036 states and 26238 transitions. [2021-06-05 06:51:28,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 26238 transitions. [2021-06-05 06:51:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:28,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:28,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:28,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:28,262 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 82 times [2021-06-05 06:51:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:28,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420176277] [2021-06-05 06:51:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:28,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420176277] [2021-06-05 06:51:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420176277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:28,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366256985] [2021-06-05 06:51:28,287 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:28,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:28,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:28,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366256985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:28,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:28,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:28,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895541697] [2021-06-05 06:51:28,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:28,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:28,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:28,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:28,364 INFO L87 Difference]: Start difference. First operand 7036 states and 26238 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:28,685 INFO L93 Difference]: Finished difference Result 10405 states and 36941 transitions. [2021-06-05 06:51:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:51:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:28,702 INFO L225 Difference]: With dead ends: 10405 [2021-06-05 06:51:28,702 INFO L226 Difference]: Without dead ends: 10405 [2021-06-05 06:51:28,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:51:28,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2021-06-05 06:51:28,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 7946. [2021-06-05 06:51:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7946 states, 7945 states have (on average 3.7539332913782255) internal successors, (29825), 7945 states have internal predecessors, (29825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7946 states to 7946 states and 29825 transitions. [2021-06-05 06:51:28,843 INFO L78 Accepts]: Start accepts. Automaton has 7946 states and 29825 transitions. Word has length 28 [2021-06-05 06:51:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:28,843 INFO L482 AbstractCegarLoop]: Abstraction has 7946 states and 29825 transitions. [2021-06-05 06:51:28,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7946 states and 29825 transitions. [2021-06-05 06:51:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:28,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:28,854 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:29,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:29,055 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 83 times [2021-06-05 06:51:29,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:29,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572183288] [2021-06-05 06:51:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:29,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:29,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572183288] [2021-06-05 06:51:29,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572183288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:29,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194574038] [2021-06-05 06:51:29,085 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:29,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:51:29,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:29,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:29,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194574038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:29,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:29,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 06:51:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480872914] [2021-06-05 06:51:29,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:29,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:29,160 INFO L87 Difference]: Start difference. First operand 7946 states and 29825 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:29,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:29,725 INFO L93 Difference]: Finished difference Result 13522 states and 48006 transitions. [2021-06-05 06:51:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:51:29,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:29,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:29,750 INFO L225 Difference]: With dead ends: 13522 [2021-06-05 06:51:29,750 INFO L226 Difference]: Without dead ends: 13518 [2021-06-05 06:51:29,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:51:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13518 states. [2021-06-05 06:51:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13518 to 7858. [2021-06-05 06:51:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7857 states have (on average 3.7557591956217387) internal successors, (29509), 7857 states have internal predecessors, (29509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 29509 transitions. [2021-06-05 06:51:29,927 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 29509 transitions. Word has length 28 [2021-06-05 06:51:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:29,927 INFO L482 AbstractCegarLoop]: Abstraction has 7858 states and 29509 transitions. [2021-06-05 06:51:29,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 29509 transitions. [2021-06-05 06:51:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:29,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:29,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:30,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3938 [2021-06-05 06:51:30,139 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash -48820569, now seen corresponding path program 84 times [2021-06-05 06:51:30,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:30,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907070117] [2021-06-05 06:51:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:30,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:30,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907070117] [2021-06-05 06:51:30,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907070117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:30,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790786120] [2021-06-05 06:51:30,172 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:30,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:51:30,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:30,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790786120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:30,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:30,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:51:30,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791623739] [2021-06-05 06:51:30,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:30,267 INFO L87 Difference]: Start difference. First operand 7858 states and 29509 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:30,668 INFO L93 Difference]: Finished difference Result 10648 states and 37827 transitions. [2021-06-05 06:51:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:51:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:30,685 INFO L225 Difference]: With dead ends: 10648 [2021-06-05 06:51:30,685 INFO L226 Difference]: Without dead ends: 10648 [2021-06-05 06:51:30,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:51:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10648 states. [2021-06-05 06:51:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10648 to 7756. [2021-06-05 06:51:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.752675693101225) internal successors, (29102), 7755 states have internal predecessors, (29102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29102 transitions. [2021-06-05 06:51:30,822 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29102 transitions. Word has length 28 [2021-06-05 06:51:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:30,822 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29102 transitions. [2021-06-05 06:51:30,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29102 transitions. [2021-06-05 06:51:30,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:30,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:30,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:31,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3939,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:31,034 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:31,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 85 times [2021-06-05 06:51:31,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:31,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173046583] [2021-06-05 06:51:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:31,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:31,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173046583] [2021-06-05 06:51:31,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173046583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:31,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167866120] [2021-06-05 06:51:31,122 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:31,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:31,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167866120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:31,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:31,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:51:31,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577935166] [2021-06-05 06:51:31,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:31,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:31,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:31,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:31,207 INFO L87 Difference]: Start difference. First operand 7756 states and 29102 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:31,882 INFO L93 Difference]: Finished difference Result 13360 states and 47364 transitions. [2021-06-05 06:51:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:51:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:31,910 INFO L225 Difference]: With dead ends: 13360 [2021-06-05 06:51:31,911 INFO L226 Difference]: Without dead ends: 13348 [2021-06-05 06:51:31,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:51:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13348 states. [2021-06-05 06:51:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13348 to 7756. [2021-06-05 06:51:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7756 states, 7755 states have (on average 3.7513862024500324) internal successors, (29092), 7755 states have internal predecessors, (29092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7756 states to 7756 states and 29092 transitions. [2021-06-05 06:51:32,095 INFO L78 Accepts]: Start accepts. Automaton has 7756 states and 29092 transitions. Word has length 28 [2021-06-05 06:51:32,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:32,095 INFO L482 AbstractCegarLoop]: Abstraction has 7756 states and 29092 transitions. [2021-06-05 06:51:32,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7756 states and 29092 transitions. [2021-06-05 06:51:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:32,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:32,106 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:32,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:32,307 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:32,307 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 86 times [2021-06-05 06:51:32,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:32,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140485277] [2021-06-05 06:51:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:32,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140485277] [2021-06-05 06:51:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140485277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237957390] [2021-06-05 06:51:32,344 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:32,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:32,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:32,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237957390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:32,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:32,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:51:32,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811447351] [2021-06-05 06:51:32,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:32,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:32,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:32,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:32,433 INFO L87 Difference]: Start difference. First operand 7756 states and 29092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:33,556 INFO L93 Difference]: Finished difference Result 20318 states and 70854 transitions. [2021-06-05 06:51:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 06:51:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:33,595 INFO L225 Difference]: With dead ends: 20318 [2021-06-05 06:51:33,595 INFO L226 Difference]: Without dead ends: 20318 [2021-06-05 06:51:33,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 644.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:51:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20318 states. [2021-06-05 06:51:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20318 to 10596. [2021-06-05 06:51:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10596 states, 10595 states have (on average 3.79443133553563) internal successors, (40202), 10595 states have internal predecessors, (40202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10596 states to 10596 states and 40202 transitions. [2021-06-05 06:51:33,908 INFO L78 Accepts]: Start accepts. Automaton has 10596 states and 40202 transitions. Word has length 28 [2021-06-05 06:51:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:33,908 INFO L482 AbstractCegarLoop]: Abstraction has 10596 states and 40202 transitions. [2021-06-05 06:51:33,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 10596 states and 40202 transitions. [2021-06-05 06:51:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:33,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:33,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:34,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:34,126 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:34,126 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 87 times [2021-06-05 06:51:34,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:34,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50094707] [2021-06-05 06:51:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:34,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:34,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50094707] [2021-06-05 06:51:34,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50094707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:34,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811816015] [2021-06-05 06:51:34,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:34,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:51:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:34,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:34,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811816015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:34,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:34,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:51:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165433199] [2021-06-05 06:51:34,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:34,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:34,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:34,246 INFO L87 Difference]: Start difference. First operand 10596 states and 40202 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:35,220 INFO L93 Difference]: Finished difference Result 19544 states and 68833 transitions. [2021-06-05 06:51:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:51:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:35,260 INFO L225 Difference]: With dead ends: 19544 [2021-06-05 06:51:35,260 INFO L226 Difference]: Without dead ends: 19532 [2021-06-05 06:51:35,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 547.3ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:51:35,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19532 states. [2021-06-05 06:51:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19532 to 10410. [2021-06-05 06:51:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10410 states, 10409 states have (on average 3.8004611393985974) internal successors, (39559), 10409 states have internal predecessors, (39559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10410 states to 10410 states and 39559 transitions. [2021-06-05 06:51:35,628 INFO L78 Accepts]: Start accepts. Automaton has 10410 states and 39559 transitions. Word has length 28 [2021-06-05 06:51:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:35,628 INFO L482 AbstractCegarLoop]: Abstraction has 10410 states and 39559 transitions. [2021-06-05 06:51:35,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10410 states and 39559 transitions. [2021-06-05 06:51:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:35,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:35,644 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:35,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3942 [2021-06-05 06:51:35,845 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 88 times [2021-06-05 06:51:35,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:35,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804228596] [2021-06-05 06:51:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:35,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:35,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804228596] [2021-06-05 06:51:35,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804228596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:35,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521616592] [2021-06-05 06:51:35,881 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:35,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:35,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:35,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521616592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:35,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:35,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:51:35,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481866595] [2021-06-05 06:51:35,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:51:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:51:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:51:35,961 INFO L87 Difference]: Start difference. First operand 10410 states and 39559 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:36,854 INFO L93 Difference]: Finished difference Result 19373 states and 68230 transitions. [2021-06-05 06:51:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:51:36,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:36,890 INFO L225 Difference]: With dead ends: 19373 [2021-06-05 06:51:36,890 INFO L226 Difference]: Without dead ends: 19337 [2021-06-05 06:51:36,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:51:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19337 states. [2021-06-05 06:51:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19337 to 10460. [2021-06-05 06:51:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10460 states, 10459 states have (on average 3.798451094750932) internal successors, (39728), 10459 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10460 states to 10460 states and 39728 transitions. [2021-06-05 06:51:37,253 INFO L78 Accepts]: Start accepts. Automaton has 10460 states and 39728 transitions. Word has length 28 [2021-06-05 06:51:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:37,253 INFO L482 AbstractCegarLoop]: Abstraction has 10460 states and 39728 transitions. [2021-06-05 06:51:37,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10460 states and 39728 transitions. [2021-06-05 06:51:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:37,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:37,268 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:37,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:37,469 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 89 times [2021-06-05 06:51:37,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:37,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265661103] [2021-06-05 06:51:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:37,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265661103] [2021-06-05 06:51:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265661103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859671473] [2021-06-05 06:51:37,507 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:37,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:51:37,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:37,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:37,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859671473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:37,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:37,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:51:37,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561451493] [2021-06-05 06:51:37,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:37,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:37,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:37,616 INFO L87 Difference]: Start difference. First operand 10460 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:38,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:38,891 INFO L93 Difference]: Finished difference Result 19259 states and 67953 transitions. [2021-06-05 06:51:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 06:51:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:38,929 INFO L225 Difference]: With dead ends: 19259 [2021-06-05 06:51:38,929 INFO L226 Difference]: Without dead ends: 19259 [2021-06-05 06:51:38,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 796.2ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:51:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19259 states. [2021-06-05 06:51:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19259 to 10656. [2021-06-05 06:51:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10656 states, 10655 states have (on average 3.7895823557015484) internal successors, (40378), 10655 states have internal predecessors, (40378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10656 states to 10656 states and 40378 transitions. [2021-06-05 06:51:39,304 INFO L78 Accepts]: Start accepts. Automaton has 10656 states and 40378 transitions. Word has length 28 [2021-06-05 06:51:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:39,304 INFO L482 AbstractCegarLoop]: Abstraction has 10656 states and 40378 transitions. [2021-06-05 06:51:39,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 10656 states and 40378 transitions. [2021-06-05 06:51:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:39,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:39,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:39,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3944 [2021-06-05 06:51:39,525 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:39,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:39,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 90 times [2021-06-05 06:51:39,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:39,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368172930] [2021-06-05 06:51:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:39,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:39,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368172930] [2021-06-05 06:51:39,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368172930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:39,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2745001] [2021-06-05 06:51:39,565 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:39,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:51:39,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2745001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:39,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:39,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:51:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212213852] [2021-06-05 06:51:39,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:39,681 INFO L87 Difference]: Start difference. First operand 10656 states and 40378 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:40,943 INFO L93 Difference]: Finished difference Result 18895 states and 66950 transitions. [2021-06-05 06:51:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:51:40,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:40,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:40,982 INFO L225 Difference]: With dead ends: 18895 [2021-06-05 06:51:40,982 INFO L226 Difference]: Without dead ends: 18883 [2021-06-05 06:51:40,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 717.0ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:51:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18883 states. [2021-06-05 06:51:41,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18883 to 10538. [2021-06-05 06:51:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10538 states, 10537 states have (on average 3.793964126411692) internal successors, (39977), 10537 states have internal predecessors, (39977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10538 states to 10538 states and 39977 transitions. [2021-06-05 06:51:41,269 INFO L78 Accepts]: Start accepts. Automaton has 10538 states and 39977 transitions. Word has length 28 [2021-06-05 06:51:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:41,269 INFO L482 AbstractCegarLoop]: Abstraction has 10538 states and 39977 transitions. [2021-06-05 06:51:41,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10538 states and 39977 transitions. [2021-06-05 06:51:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:41,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:41,284 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:41,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,484 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:41,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:41,484 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 91 times [2021-06-05 06:51:41,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:41,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816406387] [2021-06-05 06:51:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:41,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:41,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816406387] [2021-06-05 06:51:41,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816406387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054469148] [2021-06-05 06:51:41,522 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054469148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:41,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:41,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:51:41,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875554992] [2021-06-05 06:51:41,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:41,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:41,613 INFO L87 Difference]: Start difference. First operand 10538 states and 39977 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:42,584 INFO L93 Difference]: Finished difference Result 18135 states and 64866 transitions. [2021-06-05 06:51:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:51:42,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:42,619 INFO L225 Difference]: With dead ends: 18135 [2021-06-05 06:51:42,619 INFO L226 Difference]: Without dead ends: 18099 [2021-06-05 06:51:42,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:51:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18099 states. [2021-06-05 06:51:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18099 to 10562. [2021-06-05 06:51:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10562 states, 10561 states have (on average 3.7929173373733547) internal successors, (40057), 10561 states have internal predecessors, (40057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10562 states to 10562 states and 40057 transitions. [2021-06-05 06:51:42,874 INFO L78 Accepts]: Start accepts. Automaton has 10562 states and 40057 transitions. Word has length 28 [2021-06-05 06:51:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:42,874 INFO L482 AbstractCegarLoop]: Abstraction has 10562 states and 40057 transitions. [2021-06-05 06:51:42,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10562 states and 40057 transitions. [2021-06-05 06:51:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:42,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:42,890 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:43,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3946,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:43,091 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 92 times [2021-06-05 06:51:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:43,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630782281] [2021-06-05 06:51:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:43,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630782281] [2021-06-05 06:51:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630782281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975588513] [2021-06-05 06:51:43,130 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:43,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:43,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:43,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:43,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975588513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:43,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:43,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:51:43,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032479298] [2021-06-05 06:51:43,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:43,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:43,246 INFO L87 Difference]: Start difference. First operand 10562 states and 40057 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:44,444 INFO L93 Difference]: Finished difference Result 26263 states and 93462 transitions. [2021-06-05 06:51:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 06:51:44,444 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:44,494 INFO L225 Difference]: With dead ends: 26263 [2021-06-05 06:51:44,494 INFO L226 Difference]: Without dead ends: 26263 [2021-06-05 06:51:44,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 06:51:44,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26263 states. [2021-06-05 06:51:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26263 to 10852. [2021-06-05 06:51:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10852 states, 10851 states have (on average 3.818173440235923) internal successors, (41431), 10851 states have internal predecessors, (41431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10852 states to 10852 states and 41431 transitions. [2021-06-05 06:51:44,891 INFO L78 Accepts]: Start accepts. Automaton has 10852 states and 41431 transitions. Word has length 28 [2021-06-05 06:51:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:44,891 INFO L482 AbstractCegarLoop]: Abstraction has 10852 states and 41431 transitions. [2021-06-05 06:51:44,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10852 states and 41431 transitions. [2021-06-05 06:51:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:44,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:44,907 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:45,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-05 06:51:45,108 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 93 times [2021-06-05 06:51:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:45,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842036781] [2021-06-05 06:51:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:45,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:45,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842036781] [2021-06-05 06:51:45,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842036781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:45,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211862894] [2021-06-05 06:51:45,188 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:45,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:51:45,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:45,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:45,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211862894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:45,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:45,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:51:45,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305978430] [2021-06-05 06:51:45,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:45,304 INFO L87 Difference]: Start difference. First operand 10852 states and 41431 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:46,445 INFO L93 Difference]: Finished difference Result 25703 states and 92092 transitions. [2021-06-05 06:51:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:51:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:46,499 INFO L225 Difference]: With dead ends: 25703 [2021-06-05 06:51:46,499 INFO L226 Difference]: Without dead ends: 25703 [2021-06-05 06:51:46,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 697.2ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:51:46,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25703 states. [2021-06-05 06:51:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25703 to 10754. [2021-06-05 06:51:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10754 states, 10753 states have (on average 3.8055426392634613) internal successors, (40921), 10753 states have internal predecessors, (40921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10754 states to 10754 states and 40921 transitions. [2021-06-05 06:51:46,969 INFO L78 Accepts]: Start accepts. Automaton has 10754 states and 40921 transitions. Word has length 28 [2021-06-05 06:51:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:46,969 INFO L482 AbstractCegarLoop]: Abstraction has 10754 states and 40921 transitions. [2021-06-05 06:51:46,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10754 states and 40921 transitions. [2021-06-05 06:51:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:46,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:46,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:47,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3948 [2021-06-05 06:51:47,187 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 94 times [2021-06-05 06:51:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:47,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893883540] [2021-06-05 06:51:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:47,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:47,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893883540] [2021-06-05 06:51:47,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893883540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:47,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636081218] [2021-06-05 06:51:47,222 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:47,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:47,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:47,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:47,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636081218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:47,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:47,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:51:47,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614673740] [2021-06-05 06:51:47,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:47,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:47,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:47,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:47,338 INFO L87 Difference]: Start difference. First operand 10754 states and 40921 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:48,150 INFO L93 Difference]: Finished difference Result 20426 states and 73440 transitions. [2021-06-05 06:51:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:51:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:48,194 INFO L225 Difference]: With dead ends: 20426 [2021-06-05 06:51:48,194 INFO L226 Difference]: Without dead ends: 20426 [2021-06-05 06:51:48,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:51:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-05 06:51:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 10763. [2021-06-05 06:51:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10763 states, 10762 states have (on average 3.804497305333581) internal successors, (40944), 10762 states have internal predecessors, (40944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10763 states to 10763 states and 40944 transitions. [2021-06-05 06:51:48,503 INFO L78 Accepts]: Start accepts. Automaton has 10763 states and 40944 transitions. Word has length 28 [2021-06-05 06:51:48,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:48,503 INFO L482 AbstractCegarLoop]: Abstraction has 10763 states and 40944 transitions. [2021-06-05 06:51:48,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:48,503 INFO L276 IsEmpty]: Start isEmpty. Operand 10763 states and 40944 transitions. [2021-06-05 06:51:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:48,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:48,518 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:48,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:48,719 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:48,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:48,719 INFO L82 PathProgramCache]: Analyzing trace with hash -31074195, now seen corresponding path program 95 times [2021-06-05 06:51:48,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:48,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661626688] [2021-06-05 06:51:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:48,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:48,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661626688] [2021-06-05 06:51:48,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661626688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:48,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572845285] [2021-06-05 06:51:48,743 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:48,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:51:48,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:48,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:51:48,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:48,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572845285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:48,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:48,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:51:48,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162491312] [2021-06-05 06:51:48,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:51:48,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:48,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:51:48,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:51:48,817 INFO L87 Difference]: Start difference. First operand 10763 states and 40944 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:49,160 INFO L93 Difference]: Finished difference Result 12782 states and 46713 transitions. [2021-06-05 06:51:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:51:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:49,185 INFO L225 Difference]: With dead ends: 12782 [2021-06-05 06:51:49,185 INFO L226 Difference]: Without dead ends: 12749 [2021-06-05 06:51:49,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 158.2ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:51:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12749 states. [2021-06-05 06:51:49,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12749 to 10707. [2021-06-05 06:51:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10707 states, 10706 states have (on average 3.8048757705959275) internal successors, (40735), 10706 states have internal predecessors, (40735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10707 states to 10707 states and 40735 transitions. [2021-06-05 06:51:49,392 INFO L78 Accepts]: Start accepts. Automaton has 10707 states and 40735 transitions. Word has length 28 [2021-06-05 06:51:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:49,392 INFO L482 AbstractCegarLoop]: Abstraction has 10707 states and 40735 transitions. [2021-06-05 06:51:49,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 10707 states and 40735 transitions. [2021-06-05 06:51:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:49,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:49,409 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:49,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:49,609 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-06-05 06:51:49,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:49,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146370038] [2021-06-05 06:51:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:49,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146370038] [2021-06-05 06:51:49,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146370038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:49,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654104901] [2021-06-05 06:51:49,641 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:49,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:51:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:49,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654104901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:49,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:49,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:51:49,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36266532] [2021-06-05 06:51:49,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:51:49,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:51:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:51:49,781 INFO L87 Difference]: Start difference. First operand 10707 states and 40735 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:50,562 INFO L93 Difference]: Finished difference Result 18923 states and 68585 transitions. [2021-06-05 06:51:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:51:50,562 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:50,599 INFO L225 Difference]: With dead ends: 18923 [2021-06-05 06:51:50,599 INFO L226 Difference]: Without dead ends: 18923 [2021-06-05 06:51:50,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:51:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18923 states. [2021-06-05 06:51:50,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18923 to 10719. [2021-06-05 06:51:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10719 states, 10718 states have (on average 3.8041612241089755) internal successors, (40773), 10718 states have internal predecessors, (40773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10719 states to 10719 states and 40773 transitions. [2021-06-05 06:51:50,854 INFO L78 Accepts]: Start accepts. Automaton has 10719 states and 40773 transitions. Word has length 28 [2021-06-05 06:51:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:50,854 INFO L482 AbstractCegarLoop]: Abstraction has 10719 states and 40773 transitions. [2021-06-05 06:51:50,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 10719 states and 40773 transitions. [2021-06-05 06:51:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:50,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:50,869 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:51,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:51,069 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-06-05 06:51:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:51,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286705512] [2021-06-05 06:51:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:51,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:51,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286705512] [2021-06-05 06:51:51,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286705512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:51,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686456272] [2021-06-05 06:51:51,100 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:51,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:51,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686456272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:51,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:51,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:51:51,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300185946] [2021-06-05 06:51:51,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:51,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:51,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:51,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:51,213 INFO L87 Difference]: Start difference. First operand 10719 states and 40773 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:52,203 INFO L93 Difference]: Finished difference Result 19527 states and 70320 transitions. [2021-06-05 06:51:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:51:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:52,241 INFO L225 Difference]: With dead ends: 19527 [2021-06-05 06:51:52,241 INFO L226 Difference]: Without dead ends: 19527 [2021-06-05 06:51:52,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:51:52,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19527 states. [2021-06-05 06:51:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19527 to 10827. [2021-06-05 06:51:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10826 states have (on average 3.797062627009052) internal successors, (41107), 10826 states have internal predecessors, (41107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 41107 transitions. [2021-06-05 06:51:52,525 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 41107 transitions. Word has length 28 [2021-06-05 06:51:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:52,526 INFO L482 AbstractCegarLoop]: Abstraction has 10827 states and 41107 transitions. [2021-06-05 06:51:52,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 41107 transitions. [2021-06-05 06:51:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:52,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:52,542 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:52,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3952 [2021-06-05 06:51:52,742 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-06-05 06:51:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:52,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923807201] [2021-06-05 06:51:52,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:52,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923807201] [2021-06-05 06:51:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923807201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:52,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057245551] [2021-06-05 06:51:52,774 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:52,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:52,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:52,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:52,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057245551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:52,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:52,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:51:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126033524] [2021-06-05 06:51:52,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:52,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:52,890 INFO L87 Difference]: Start difference. First operand 10827 states and 41107 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:53,734 INFO L93 Difference]: Finished difference Result 19102 states and 69164 transitions. [2021-06-05 06:51:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:51:53,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:53,770 INFO L225 Difference]: With dead ends: 19102 [2021-06-05 06:51:53,770 INFO L226 Difference]: Without dead ends: 19098 [2021-06-05 06:51:53,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:51:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19098 states. [2021-06-05 06:51:54,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19098 to 10753. [2021-06-05 06:51:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10753 states, 10752 states have (on average 3.800967261904762) internal successors, (40868), 10752 states have internal predecessors, (40868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10753 states to 10753 states and 40868 transitions. [2021-06-05 06:51:54,068 INFO L78 Accepts]: Start accepts. Automaton has 10753 states and 40868 transitions. Word has length 28 [2021-06-05 06:51:54,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:54,068 INFO L482 AbstractCegarLoop]: Abstraction has 10753 states and 40868 transitions. [2021-06-05 06:51:54,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:54,068 INFO L276 IsEmpty]: Start isEmpty. Operand 10753 states and 40868 transitions. [2021-06-05 06:51:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:54,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:54,083 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:54,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3953,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:54,284 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:54,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:54,284 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-06-05 06:51:54,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:54,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841910095] [2021-06-05 06:51:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:54,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:54,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841910095] [2021-06-05 06:51:54,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841910095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:54,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334366190] [2021-06-05 06:51:54,320 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:54,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:51:54,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:54,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:54,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334366190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:54,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:54,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:51:54,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959364998] [2021-06-05 06:51:54,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:54,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:54,430 INFO L87 Difference]: Start difference. First operand 10753 states and 40868 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:55,384 INFO L93 Difference]: Finished difference Result 18533 states and 66656 transitions. [2021-06-05 06:51:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:51:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:55,420 INFO L225 Difference]: With dead ends: 18533 [2021-06-05 06:51:55,420 INFO L226 Difference]: Without dead ends: 18533 [2021-06-05 06:51:55,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:51:55,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18533 states. [2021-06-05 06:51:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18533 to 10980. [2021-06-05 06:51:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.8041716003278987) internal successors, (41766), 10979 states have internal predecessors, (41766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41766 transitions. [2021-06-05 06:51:55,677 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41766 transitions. Word has length 28 [2021-06-05 06:51:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41766 transitions. [2021-06-05 06:51:55,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41766 transitions. [2021-06-05 06:51:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:55,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:55,692 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:55,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-06-05 06:51:55,893 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-06-05 06:51:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588377325] [2021-06-05 06:51:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:55,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:55,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588377325] [2021-06-05 06:51:55,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588377325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:55,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426944627] [2021-06-05 06:51:55,933 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:55,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:51:55,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:55,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:56,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426944627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:56,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:56,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:51:56,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687961889] [2021-06-05 06:51:56,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:51:56,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:51:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:51:56,031 INFO L87 Difference]: Start difference. First operand 10980 states and 41766 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:56,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:56,909 INFO L93 Difference]: Finished difference Result 18246 states and 65858 transitions. [2021-06-05 06:51:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:51:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:56,944 INFO L225 Difference]: With dead ends: 18246 [2021-06-05 06:51:56,944 INFO L226 Difference]: Without dead ends: 18234 [2021-06-05 06:51:56,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:51:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18234 states. [2021-06-05 06:51:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18234 to 11082. [2021-06-05 06:51:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 3.798303402220016) internal successors, (42089), 11081 states have internal predecessors, (42089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 42089 transitions. [2021-06-05 06:51:57,251 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 42089 transitions. Word has length 28 [2021-06-05 06:51:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:57,251 INFO L482 AbstractCegarLoop]: Abstraction has 11082 states and 42089 transitions. [2021-06-05 06:51:57,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 42089 transitions. [2021-06-05 06:51:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:57,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:57,266 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:57,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3955,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,467 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 72 times [2021-06-05 06:51:57,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:57,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905194399] [2021-06-05 06:51:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:57,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:57,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905194399] [2021-06-05 06:51:57,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905194399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:57,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937066796] [2021-06-05 06:51:57,503 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:57,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:51:57,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:57,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937066796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:57,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:57,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:51:57,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776702048] [2021-06-05 06:51:57,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:51:57,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:57,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:51:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:51:57,584 INFO L87 Difference]: Start difference. First operand 11082 states and 42089 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:58,002 INFO L93 Difference]: Finished difference Result 15733 states and 58180 transitions. [2021-06-05 06:51:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:51:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:58,034 INFO L225 Difference]: With dead ends: 15733 [2021-06-05 06:51:58,034 INFO L226 Difference]: Without dead ends: 15733 [2021-06-05 06:51:58,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:51:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15733 states. [2021-06-05 06:51:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15733 to 11154. [2021-06-05 06:51:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11154 states, 11153 states have (on average 3.7938671209540034) internal successors, (42313), 11153 states have internal predecessors, (42313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 42313 transitions. [2021-06-05 06:51:58,267 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 42313 transitions. Word has length 28 [2021-06-05 06:51:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:58,267 INFO L482 AbstractCegarLoop]: Abstraction has 11154 states and 42313 transitions. [2021-06-05 06:51:58,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 42313 transitions. [2021-06-05 06:51:58,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:58,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:58,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:58,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-06-05 06:51:58,484 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:58,484 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 73 times [2021-06-05 06:51:58,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:58,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15329726] [2021-06-05 06:51:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:58,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:58,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15329726] [2021-06-05 06:51:58,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15329726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:58,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012115682] [2021-06-05 06:51:58,516 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:58,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:51:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012115682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:58,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:58,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:51:58,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119228986] [2021-06-05 06:51:58,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:58,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:58,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:58,598 INFO L87 Difference]: Start difference. First operand 11154 states and 42313 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:51:59,069 INFO L93 Difference]: Finished difference Result 16710 states and 61024 transitions. [2021-06-05 06:51:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:51:59,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:51:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:51:59,102 INFO L225 Difference]: With dead ends: 16710 [2021-06-05 06:51:59,102 INFO L226 Difference]: Without dead ends: 16710 [2021-06-05 06:51:59,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:51:59,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-05 06:51:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 11484. [2021-06-05 06:51:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 3.7768875729339024) internal successors, (43370), 11483 states have internal predecessors, (43370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 43370 transitions. [2021-06-05 06:51:59,340 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 43370 transitions. Word has length 28 [2021-06-05 06:51:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:51:59,340 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 43370 transitions. [2021-06-05 06:51:59,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:51:59,341 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 43370 transitions. [2021-06-05 06:51:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:51:59,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:51:59,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:51:59,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:59,558 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:51:59,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:51:59,558 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 74 times [2021-06-05 06:51:59,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:51:59,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080016401] [2021-06-05 06:51:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:51:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:51:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:59,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:51:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080016401] [2021-06-05 06:51:59,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080016401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:59,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063224219] [2021-06-05 06:51:59,589 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:51:59,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:51:59,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:51:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:51:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:51:59,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:51:59,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063224219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:51:59,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:51:59,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:51:59,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225657284] [2021-06-05 06:51:59,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:51:59,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:51:59,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:51:59,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:51:59,663 INFO L87 Difference]: Start difference. First operand 11484 states and 43370 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:00,048 INFO L93 Difference]: Finished difference Result 16200 states and 59687 transitions. [2021-06-05 06:52:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:52:00,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:00,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:00,080 INFO L225 Difference]: With dead ends: 16200 [2021-06-05 06:52:00,080 INFO L226 Difference]: Without dead ends: 16192 [2021-06-05 06:52:00,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:52:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16192 states. [2021-06-05 06:52:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16192 to 11424. [2021-06-05 06:52:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11424 states, 11423 states have (on average 3.7788671977589074) internal successors, (43166), 11423 states have internal predecessors, (43166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11424 states to 11424 states and 43166 transitions. [2021-06-05 06:52:00,408 INFO L78 Accepts]: Start accepts. Automaton has 11424 states and 43166 transitions. Word has length 28 [2021-06-05 06:52:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:00,408 INFO L482 AbstractCegarLoop]: Abstraction has 11424 states and 43166 transitions. [2021-06-05 06:52:00,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11424 states and 43166 transitions. [2021-06-05 06:52:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:00,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:00,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:00,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3958 [2021-06-05 06:52:00,626 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 75 times [2021-06-05 06:52:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:00,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328012874] [2021-06-05 06:52:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:00,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:00,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328012874] [2021-06-05 06:52:00,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328012874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:00,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627530995] [2021-06-05 06:52:00,667 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:00,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:52:00,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:00,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:00,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:00,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627530995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:00,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:00,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:52:00,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814856355] [2021-06-05 06:52:00,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:00,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:00,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:00,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:00,752 INFO L87 Difference]: Start difference. First operand 11424 states and 43166 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:01,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:01,196 INFO L93 Difference]: Finished difference Result 16100 states and 59399 transitions. [2021-06-05 06:52:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:52:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:01,233 INFO L225 Difference]: With dead ends: 16100 [2021-06-05 06:52:01,233 INFO L226 Difference]: Without dead ends: 16088 [2021-06-05 06:52:01,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:52:01,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16088 states. [2021-06-05 06:52:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16088 to 11406. [2021-06-05 06:52:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11406 states, 11405 states have (on average 3.779307321350285) internal successors, (43103), 11405 states have internal predecessors, (43103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11406 states to 11406 states and 43103 transitions. [2021-06-05 06:52:01,520 INFO L78 Accepts]: Start accepts. Automaton has 11406 states and 43103 transitions. Word has length 28 [2021-06-05 06:52:01,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:01,520 INFO L482 AbstractCegarLoop]: Abstraction has 11406 states and 43103 transitions. [2021-06-05 06:52:01,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:01,520 INFO L276 IsEmpty]: Start isEmpty. Operand 11406 states and 43103 transitions. [2021-06-05 06:52:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:01,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:01,536 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:01,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3959 [2021-06-05 06:52:01,736 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:01,736 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 76 times [2021-06-05 06:52:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:01,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149951459] [2021-06-05 06:52:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:01,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:01,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149951459] [2021-06-05 06:52:01,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149951459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130907717] [2021-06-05 06:52:01,767 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:01,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:01,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130907717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:01,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:01,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:52:01,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311949416] [2021-06-05 06:52:01,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:52:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:52:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:52:01,871 INFO L87 Difference]: Start difference. First operand 11406 states and 43103 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:02,711 INFO L93 Difference]: Finished difference Result 21916 states and 78065 transitions. [2021-06-05 06:52:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:52:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:02,749 INFO L225 Difference]: With dead ends: 21916 [2021-06-05 06:52:02,749 INFO L226 Difference]: Without dead ends: 21916 [2021-06-05 06:52:02,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:52:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21916 states. [2021-06-05 06:52:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21916 to 11388. [2021-06-05 06:52:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11388 states, 11387 states have (on average 3.7779924475278825) internal successors, (43020), 11387 states have internal predecessors, (43020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11388 states to 11388 states and 43020 transitions. [2021-06-05 06:52:03,034 INFO L78 Accepts]: Start accepts. Automaton has 11388 states and 43020 transitions. Word has length 28 [2021-06-05 06:52:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:03,034 INFO L482 AbstractCegarLoop]: Abstraction has 11388 states and 43020 transitions. [2021-06-05 06:52:03,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 11388 states and 43020 transitions. [2021-06-05 06:52:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:03,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:03,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:03,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3960,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:03,252 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:03,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1660375731, now seen corresponding path program 101 times [2021-06-05 06:52:03,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:03,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023462544] [2021-06-05 06:52:03,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:03,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:03,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:03,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023462544] [2021-06-05 06:52:03,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023462544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:03,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729393143] [2021-06-05 06:52:03,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:03,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:03,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729393143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:03,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:03,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:52:03,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65860367] [2021-06-05 06:52:03,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:03,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:03,378 INFO L87 Difference]: Start difference. First operand 11388 states and 43020 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:04,039 INFO L93 Difference]: Finished difference Result 17700 states and 63852 transitions. [2021-06-05 06:52:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:52:04,040 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:04,074 INFO L225 Difference]: With dead ends: 17700 [2021-06-05 06:52:04,074 INFO L226 Difference]: Without dead ends: 17684 [2021-06-05 06:52:04,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:52:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17684 states. [2021-06-05 06:52:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17684 to 12696. [2021-06-05 06:52:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12696 states, 12695 states have (on average 3.8450571090980703) internal successors, (48813), 12695 states have internal predecessors, (48813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12696 states to 12696 states and 48813 transitions. [2021-06-05 06:52:04,424 INFO L78 Accepts]: Start accepts. Automaton has 12696 states and 48813 transitions. Word has length 28 [2021-06-05 06:52:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:04,424 INFO L482 AbstractCegarLoop]: Abstraction has 12696 states and 48813 transitions. [2021-06-05 06:52:04,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 12696 states and 48813 transitions. [2021-06-05 06:52:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:04,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:04,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:04,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:04,646 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:04,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1748793285, now seen corresponding path program 102 times [2021-06-05 06:52:04,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:04,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893136259] [2021-06-05 06:52:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:04,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893136259] [2021-06-05 06:52:04,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893136259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:04,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832449270] [2021-06-05 06:52:04,671 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:04,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:04,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832449270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:04,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:04,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 06:52:04,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360863094] [2021-06-05 06:52:04,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:04,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:04,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:04,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:04,790 INFO L87 Difference]: Start difference. First operand 12696 states and 48813 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:05,454 INFO L93 Difference]: Finished difference Result 17792 states and 64097 transitions. [2021-06-05 06:52:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:52:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:05,490 INFO L225 Difference]: With dead ends: 17792 [2021-06-05 06:52:05,490 INFO L226 Difference]: Without dead ends: 17786 [2021-06-05 06:52:05,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:52:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17786 states. [2021-06-05 06:52:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17786 to 12666. [2021-06-05 06:52:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12666 states, 12665 states have (on average 3.844295302013423) internal successors, (48688), 12665 states have internal predecessors, (48688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12666 states to 12666 states and 48688 transitions. [2021-06-05 06:52:05,771 INFO L78 Accepts]: Start accepts. Automaton has 12666 states and 48688 transitions. Word has length 28 [2021-06-05 06:52:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:05,771 INFO L482 AbstractCegarLoop]: Abstraction has 12666 states and 48688 transitions. [2021-06-05 06:52:05,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 12666 states and 48688 transitions. [2021-06-05 06:52:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:05,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:05,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:05,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:05,991 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1491665525, now seen corresponding path program 103 times [2021-06-05 06:52:05,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:05,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400816037] [2021-06-05 06:52:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:06,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:06,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400816037] [2021-06-05 06:52:06,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400816037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:06,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978420532] [2021-06-05 06:52:06,016 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978420532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:06,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:06,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:52:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399090199] [2021-06-05 06:52:06,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:06,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:06,107 INFO L87 Difference]: Start difference. First operand 12666 states and 48688 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:06,697 INFO L93 Difference]: Finished difference Result 19854 states and 71614 transitions. [2021-06-05 06:52:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:52:06,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:06,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:06,736 INFO L225 Difference]: With dead ends: 19854 [2021-06-05 06:52:06,737 INFO L226 Difference]: Without dead ends: 19838 [2021-06-05 06:52:06,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:52:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19838 states. [2021-06-05 06:52:07,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19838 to 12721. [2021-06-05 06:52:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12720 states have (on average 3.8488207547169813) internal successors, (48957), 12720 states have internal predecessors, (48957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 48957 transitions. [2021-06-05 06:52:07,053 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 48957 transitions. Word has length 28 [2021-06-05 06:52:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:07,053 INFO L482 AbstractCegarLoop]: Abstraction has 12721 states and 48957 transitions. [2021-06-05 06:52:07,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 48957 transitions. [2021-06-05 06:52:07,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:07,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:07,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:07,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3963,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:07,276 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-06-05 06:52:07,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:07,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201732589] [2021-06-05 06:52:07,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:07,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201732589] [2021-06-05 06:52:07,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201732589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469097582] [2021-06-05 06:52:07,304 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:07,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:07,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:07,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:07,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469097582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:07,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:07,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 06:52:07,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523041932] [2021-06-05 06:52:07,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:07,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:07,429 INFO L87 Difference]: Start difference. First operand 12721 states and 48957 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:08,075 INFO L93 Difference]: Finished difference Result 20992 states and 75172 transitions. [2021-06-05 06:52:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:52:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:08,115 INFO L225 Difference]: With dead ends: 20992 [2021-06-05 06:52:08,116 INFO L226 Difference]: Without dead ends: 20992 [2021-06-05 06:52:08,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:52:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20992 states. [2021-06-05 06:52:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20992 to 12737. [2021-06-05 06:52:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12737 states, 12736 states have (on average 3.845791457286432) internal successors, (48980), 12736 states have internal predecessors, (48980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12737 states to 12737 states and 48980 transitions. [2021-06-05 06:52:08,486 INFO L78 Accepts]: Start accepts. Automaton has 12737 states and 48980 transitions. Word has length 28 [2021-06-05 06:52:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:08,486 INFO L482 AbstractCegarLoop]: Abstraction has 12737 states and 48980 transitions. [2021-06-05 06:52:08,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 12737 states and 48980 transitions. [2021-06-05 06:52:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:08,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:08,506 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:08,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3964,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:08,707 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:08,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 77 times [2021-06-05 06:52:08,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:08,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452722472] [2021-06-05 06:52:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:08,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:08,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452722472] [2021-06-05 06:52:08,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452722472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:08,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489773851] [2021-06-05 06:52:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:08,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:52:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:08,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:08,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:08,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489773851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:08,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:08,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:52:08,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481123566] [2021-06-05 06:52:08,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:08,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:08,849 INFO L87 Difference]: Start difference. First operand 12737 states and 48980 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:09,701 INFO L93 Difference]: Finished difference Result 22133 states and 81225 transitions. [2021-06-05 06:52:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:52:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:09,745 INFO L225 Difference]: With dead ends: 22133 [2021-06-05 06:52:09,745 INFO L226 Difference]: Without dead ends: 22129 [2021-06-05 06:52:09,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:52:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22129 states. [2021-06-05 06:52:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22129 to 12991. [2021-06-05 06:52:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.8354888375673597) internal successors, (49823), 12990 states have internal predecessors, (49823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 49823 transitions. [2021-06-05 06:52:10,076 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 49823 transitions. Word has length 28 [2021-06-05 06:52:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:10,076 INFO L482 AbstractCegarLoop]: Abstraction has 12991 states and 49823 transitions. [2021-06-05 06:52:10,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 49823 transitions. [2021-06-05 06:52:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:10,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:10,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:10,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:10,297 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1750460849, now seen corresponding path program 105 times [2021-06-05 06:52:10,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:10,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727984166] [2021-06-05 06:52:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:10,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727984166] [2021-06-05 06:52:10,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727984166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:10,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241240884] [2021-06-05 06:52:10,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:10,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:10,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:10,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:10,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241240884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:10,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:10,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:52:10,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74362040] [2021-06-05 06:52:10,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:10,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:10,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:10,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:10,411 INFO L87 Difference]: Start difference. First operand 12991 states and 49823 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:10,990 INFO L93 Difference]: Finished difference Result 18794 states and 68812 transitions. [2021-06-05 06:52:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:52:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:11,027 INFO L225 Difference]: With dead ends: 18794 [2021-06-05 06:52:11,028 INFO L226 Difference]: Without dead ends: 18768 [2021-06-05 06:52:11,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:52:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18768 states. [2021-06-05 06:52:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18768 to 13271. [2021-06-05 06:52:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 3.853654860587792) internal successors, (51138), 13270 states have internal predecessors, (51138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 51138 transitions. [2021-06-05 06:52:11,318 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 51138 transitions. Word has length 28 [2021-06-05 06:52:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:11,318 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 51138 transitions. [2021-06-05 06:52:11,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 51138 transitions. [2021-06-05 06:52:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:11,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:11,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:11,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3966 [2021-06-05 06:52:11,539 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-06-05 06:52:11,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:11,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100880135] [2021-06-05 06:52:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:11,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100880135] [2021-06-05 06:52:11,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100880135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:11,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13229160] [2021-06-05 06:52:11,567 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:11,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:11,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:11,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:11,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:11,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13229160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:11,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:11,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:52:11,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540890948] [2021-06-05 06:52:11,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:11,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:11,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:11,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:11,656 INFO L87 Difference]: Start difference. First operand 13271 states and 51138 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:12,378 INFO L93 Difference]: Finished difference Result 18772 states and 67861 transitions. [2021-06-05 06:52:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:52:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:12,412 INFO L225 Difference]: With dead ends: 18772 [2021-06-05 06:52:12,412 INFO L226 Difference]: Without dead ends: 18772 [2021-06-05 06:52:12,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:52:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18772 states. [2021-06-05 06:52:12,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18772 to 13226. [2021-06-05 06:52:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13226 states, 13225 states have (on average 3.8455198487712665) internal successors, (50857), 13225 states have internal predecessors, (50857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:12,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13226 states to 13226 states and 50857 transitions. [2021-06-05 06:52:12,670 INFO L78 Accepts]: Start accepts. Automaton has 13226 states and 50857 transitions. Word has length 28 [2021-06-05 06:52:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:12,670 INFO L482 AbstractCegarLoop]: Abstraction has 13226 states and 50857 transitions. [2021-06-05 06:52:12,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13226 states and 50857 transitions. [2021-06-05 06:52:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:12,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:12,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:12,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3967,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:12,890 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-06-05 06:52:12,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:12,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982992841] [2021-06-05 06:52:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:12,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982992841] [2021-06-05 06:52:12,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982992841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:12,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319548054] [2021-06-05 06:52:12,919 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:12,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:52:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:12,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:13,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319548054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:13,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:13,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:52:13,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369544269] [2021-06-05 06:52:13,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:13,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:13,007 INFO L87 Difference]: Start difference. First operand 13226 states and 50857 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:13,594 INFO L93 Difference]: Finished difference Result 20120 states and 73134 transitions. [2021-06-05 06:52:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:52:13,595 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:13,633 INFO L225 Difference]: With dead ends: 20120 [2021-06-05 06:52:13,633 INFO L226 Difference]: Without dead ends: 20120 [2021-06-05 06:52:13,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:52:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-06-05 06:52:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 13939. [2021-06-05 06:52:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 13938 states have (on average 3.8318266609269624) internal successors, (53408), 13938 states have internal predecessors, (53408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 53408 transitions. [2021-06-05 06:52:13,945 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 53408 transitions. Word has length 28 [2021-06-05 06:52:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:13,945 INFO L482 AbstractCegarLoop]: Abstraction has 13939 states and 53408 transitions. [2021-06-05 06:52:13,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 53408 transitions. [2021-06-05 06:52:13,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:13,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:13,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:14,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-05 06:52:14,166 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:14,166 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-06-05 06:52:14,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:14,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20145360] [2021-06-05 06:52:14,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:14,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:14,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20145360] [2021-06-05 06:52:14,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20145360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:14,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235896125] [2021-06-05 06:52:14,195 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:14,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:52:14,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:14,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235896125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:14,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:14,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:52:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991901820] [2021-06-05 06:52:14,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:14,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:14,287 INFO L87 Difference]: Start difference. First operand 13939 states and 53408 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:15,049 INFO L93 Difference]: Finished difference Result 22535 states and 80778 transitions. [2021-06-05 06:52:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:52:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:15,092 INFO L225 Difference]: With dead ends: 22535 [2021-06-05 06:52:15,092 INFO L226 Difference]: Without dead ends: 22535 [2021-06-05 06:52:15,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:52:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2021-06-05 06:52:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 14169. [2021-06-05 06:52:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14169 states, 14168 states have (on average 3.8435206098249575) internal successors, (54455), 14168 states have internal predecessors, (54455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 54455 transitions. [2021-06-05 06:52:15,407 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 54455 transitions. Word has length 28 [2021-06-05 06:52:15,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:15,407 INFO L482 AbstractCegarLoop]: Abstraction has 14169 states and 54455 transitions. [2021-06-05 06:52:15,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 54455 transitions. [2021-06-05 06:52:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:15,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:15,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:15,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:15,629 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 78 times [2021-06-05 06:52:15,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:15,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443244414] [2021-06-05 06:52:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:15,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:15,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443244414] [2021-06-05 06:52:15,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443244414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325976905] [2021-06-05 06:52:15,660 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:15,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:52:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:15,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:15,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325976905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:15,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:15,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:52:15,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625329987] [2021-06-05 06:52:15,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:15,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:15,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:15,772 INFO L87 Difference]: Start difference. First operand 14169 states and 54455 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:17,162 INFO L93 Difference]: Finished difference Result 39203 states and 140890 transitions. [2021-06-05 06:52:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:52:17,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:17,255 INFO L225 Difference]: With dead ends: 39203 [2021-06-05 06:52:17,255 INFO L226 Difference]: Without dead ends: 39203 [2021-06-05 06:52:17,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 849.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:52:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39203 states. [2021-06-05 06:52:17,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39203 to 15405. [2021-06-05 06:52:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15405 states, 15404 states have (on average 3.890028564009348) internal successors, (59922), 15404 states have internal predecessors, (59922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15405 states to 15405 states and 59922 transitions. [2021-06-05 06:52:17,838 INFO L78 Accepts]: Start accepts. Automaton has 15405 states and 59922 transitions. Word has length 28 [2021-06-05 06:52:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:17,838 INFO L482 AbstractCegarLoop]: Abstraction has 15405 states and 59922 transitions. [2021-06-05 06:52:17,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 15405 states and 59922 transitions. [2021-06-05 06:52:17,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:17,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:17,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:18,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3970,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:18,061 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:18,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 79 times [2021-06-05 06:52:18,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:18,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286917847] [2021-06-05 06:52:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:18,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:18,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286917847] [2021-06-05 06:52:18,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286917847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:18,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418314381] [2021-06-05 06:52:18,093 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:18,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:18,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418314381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:18,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:18,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:52:18,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338216002] [2021-06-05 06:52:18,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:18,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:18,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:18,204 INFO L87 Difference]: Start difference. First operand 15405 states and 59922 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:19,568 INFO L93 Difference]: Finished difference Result 38231 states and 138333 transitions. [2021-06-05 06:52:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:52:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:19,651 INFO L225 Difference]: With dead ends: 38231 [2021-06-05 06:52:19,651 INFO L226 Difference]: Without dead ends: 38231 [2021-06-05 06:52:19,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 06:52:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38231 states. [2021-06-05 06:52:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38231 to 15379. [2021-06-05 06:52:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15379 states, 15378 states have (on average 3.886461178306672) internal successors, (59766), 15378 states have internal predecessors, (59766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15379 states to 15379 states and 59766 transitions. [2021-06-05 06:52:20,274 INFO L78 Accepts]: Start accepts. Automaton has 15379 states and 59766 transitions. Word has length 28 [2021-06-05 06:52:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:20,275 INFO L482 AbstractCegarLoop]: Abstraction has 15379 states and 59766 transitions. [2021-06-05 06:52:20,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 15379 states and 59766 transitions. [2021-06-05 06:52:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:20,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:20,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:20,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3971,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:20,498 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:20,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-06-05 06:52:20,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:20,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337417787] [2021-06-05 06:52:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:20,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:20,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337417787] [2021-06-05 06:52:20,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337417787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:20,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213133921] [2021-06-05 06:52:20,530 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213133921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:20,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:20,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:20,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769860626] [2021-06-05 06:52:20,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:20,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:20,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:20,600 INFO L87 Difference]: Start difference. First operand 15379 states and 59766 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:20,847 INFO L93 Difference]: Finished difference Result 23740 states and 90889 transitions. [2021-06-05 06:52:20,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:52:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:20,896 INFO L225 Difference]: With dead ends: 23740 [2021-06-05 06:52:20,896 INFO L226 Difference]: Without dead ends: 23693 [2021-06-05 06:52:20,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:52:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23693 states. [2021-06-05 06:52:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23693 to 20498. [2021-06-05 06:52:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20498 states, 20497 states have (on average 3.9016441430453237) internal successors, (79972), 20497 states have internal predecessors, (79972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20498 states to 20498 states and 79972 transitions. [2021-06-05 06:52:21,321 INFO L78 Accepts]: Start accepts. Automaton has 20498 states and 79972 transitions. Word has length 28 [2021-06-05 06:52:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:21,321 INFO L482 AbstractCegarLoop]: Abstraction has 20498 states and 79972 transitions. [2021-06-05 06:52:21,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20498 states and 79972 transitions. [2021-06-05 06:52:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:21,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:21,352 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:21,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3972,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:21,554 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-06-05 06:52:21,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:21,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373792200] [2021-06-05 06:52:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:21,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:21,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373792200] [2021-06-05 06:52:21,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373792200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:21,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402515821] [2021-06-05 06:52:21,581 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:21,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:21,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:21,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402515821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:21,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:21,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:52:21,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819931407] [2021-06-05 06:52:21,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:21,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:21,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:21,654 INFO L87 Difference]: Start difference. First operand 20498 states and 79972 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:21,879 INFO L93 Difference]: Finished difference Result 23252 states and 88342 transitions. [2021-06-05 06:52:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:52:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:21,929 INFO L225 Difference]: With dead ends: 23252 [2021-06-05 06:52:21,929 INFO L226 Difference]: Without dead ends: 23252 [2021-06-05 06:52:21,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23252 states. [2021-06-05 06:52:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23252 to 20001. [2021-06-05 06:52:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20001 states, 20000 states have (on average 3.89) internal successors, (77800), 20000 states have internal predecessors, (77800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 77800 transitions. [2021-06-05 06:52:22,343 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 77800 transitions. Word has length 28 [2021-06-05 06:52:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:22,343 INFO L482 AbstractCegarLoop]: Abstraction has 20001 states and 77800 transitions. [2021-06-05 06:52:22,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 77800 transitions. [2021-06-05 06:52:22,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:22,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:22,373 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:22,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3973 [2021-06-05 06:52:22,577 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:22,577 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-06-05 06:52:22,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:22,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101968023] [2021-06-05 06:52:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:22,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:22,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101968023] [2021-06-05 06:52:22,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101968023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:22,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93781253] [2021-06-05 06:52:22,616 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:22,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:52:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:22,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:22,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93781253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:22,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:22,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 06:52:22,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232991197] [2021-06-05 06:52:22,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:52:22,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:52:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:52:22,716 INFO L87 Difference]: Start difference. First operand 20001 states and 77800 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:23,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:23,566 INFO L93 Difference]: Finished difference Result 31840 states and 117907 transitions. [2021-06-05 06:52:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:52:23,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:23,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:23,766 INFO L225 Difference]: With dead ends: 31840 [2021-06-05 06:52:23,767 INFO L226 Difference]: Without dead ends: 31840 [2021-06-05 06:52:23,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:52:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31840 states. [2021-06-05 06:52:24,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31840 to 20067. [2021-06-05 06:52:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20067 states, 20066 states have (on average 3.888069371075451) internal successors, (78018), 20066 states have internal predecessors, (78018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20067 states to 20067 states and 78018 transitions. [2021-06-05 06:52:24,297 INFO L78 Accepts]: Start accepts. Automaton has 20067 states and 78018 transitions. Word has length 28 [2021-06-05 06:52:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:24,297 INFO L482 AbstractCegarLoop]: Abstraction has 20067 states and 78018 transitions. [2021-06-05 06:52:24,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 20067 states and 78018 transitions. [2021-06-05 06:52:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:24,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:24,329 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:24,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3974,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:24,530 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:24,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:24,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-06-05 06:52:24,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:24,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469273959] [2021-06-05 06:52:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:24,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:24,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469273959] [2021-06-05 06:52:24,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469273959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:24,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330707225] [2021-06-05 06:52:24,570 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:24,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:24,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:24,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330707225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:24,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:24,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:52:24,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386340356] [2021-06-05 06:52:24,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:24,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:24,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:24,688 INFO L87 Difference]: Start difference. First operand 20067 states and 78018 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:26,085 INFO L93 Difference]: Finished difference Result 40672 states and 148990 transitions. [2021-06-05 06:52:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 06:52:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:26,186 INFO L225 Difference]: With dead ends: 40672 [2021-06-05 06:52:26,186 INFO L226 Difference]: Without dead ends: 40672 [2021-06-05 06:52:26,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 798.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:52:26,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40672 states. [2021-06-05 06:52:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40672 to 20072. [2021-06-05 06:52:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20072 states, 20071 states have (on average 3.8901400029893876) internal successors, (78079), 20071 states have internal predecessors, (78079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20072 states to 20072 states and 78079 transitions. [2021-06-05 06:52:26,793 INFO L78 Accepts]: Start accepts. Automaton has 20072 states and 78079 transitions. Word has length 28 [2021-06-05 06:52:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:26,793 INFO L482 AbstractCegarLoop]: Abstraction has 20072 states and 78079 transitions. [2021-06-05 06:52:26,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 20072 states and 78079 transitions. [2021-06-05 06:52:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:26,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:26,825 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:27,025 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:27,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-06-05 06:52:27,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:27,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436351306] [2021-06-05 06:52:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:27,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:27,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436351306] [2021-06-05 06:52:27,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436351306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:27,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48848692] [2021-06-05 06:52:27,060 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:27,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:52:27,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:27,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:27,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:27,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48848692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:27,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:27,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:52:27,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102352540] [2021-06-05 06:52:27,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:27,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:27,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:27,173 INFO L87 Difference]: Start difference. First operand 20072 states and 78079 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:28,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:28,613 INFO L93 Difference]: Finished difference Result 40237 states and 148140 transitions. [2021-06-05 06:52:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:52:28,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:28,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:28,707 INFO L225 Difference]: With dead ends: 40237 [2021-06-05 06:52:28,708 INFO L226 Difference]: Without dead ends: 40237 [2021-06-05 06:52:28,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 781.6ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:52:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40237 states. [2021-06-05 06:52:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40237 to 19860. [2021-06-05 06:52:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19860 states, 19859 states have (on average 3.8822700035248503) internal successors, (77098), 19859 states have internal predecessors, (77098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19860 states to 19860 states and 77098 transitions. [2021-06-05 06:52:29,264 INFO L78 Accepts]: Start accepts. Automaton has 19860 states and 77098 transitions. Word has length 28 [2021-06-05 06:52:29,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:29,264 INFO L482 AbstractCegarLoop]: Abstraction has 19860 states and 77098 transitions. [2021-06-05 06:52:29,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand 19860 states and 77098 transitions. [2021-06-05 06:52:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:29,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:29,295 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:29,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3976 [2021-06-05 06:52:29,495 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-06-05 06:52:29,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:29,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731811158] [2021-06-05 06:52:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:29,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:29,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731811158] [2021-06-05 06:52:29,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731811158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:29,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677711958] [2021-06-05 06:52:29,521 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:29,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:29,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:52:29,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677711958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:29,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:29,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:52:29,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976539466] [2021-06-05 06:52:29,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:29,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:29,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:29,594 INFO L87 Difference]: Start difference. First operand 19860 states and 77098 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:29,839 INFO L93 Difference]: Finished difference Result 29387 states and 109674 transitions. [2021-06-05 06:52:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:52:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:29,904 INFO L225 Difference]: With dead ends: 29387 [2021-06-05 06:52:29,904 INFO L226 Difference]: Without dead ends: 29370 [2021-06-05 06:52:29,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:52:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29370 states. [2021-06-05 06:52:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29370 to 20128. [2021-06-05 06:52:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20128 states, 20127 states have (on average 3.887812391315149) internal successors, (78250), 20127 states have internal predecessors, (78250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20128 states to 20128 states and 78250 transitions. [2021-06-05 06:52:30,344 INFO L78 Accepts]: Start accepts. Automaton has 20128 states and 78250 transitions. Word has length 28 [2021-06-05 06:52:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:30,345 INFO L482 AbstractCegarLoop]: Abstraction has 20128 states and 78250 transitions. [2021-06-05 06:52:30,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 20128 states and 78250 transitions. [2021-06-05 06:52:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:30,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:30,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:30,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3977,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:30,576 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:30,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-06-05 06:52:30,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:30,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315391377] [2021-06-05 06:52:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:30,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:30,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315391377] [2021-06-05 06:52:30,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315391377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:30,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348783128] [2021-06-05 06:52:30,601 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:52:30,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348783128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:30,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:30,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 06:52:30,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205331640] [2021-06-05 06:52:30,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:30,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:30,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:30,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:30,676 INFO L87 Difference]: Start difference. First operand 20128 states and 78250 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:30,929 INFO L93 Difference]: Finished difference Result 31182 states and 115264 transitions. [2021-06-05 06:52:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:52:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:30,998 INFO L225 Difference]: With dead ends: 31182 [2021-06-05 06:52:30,998 INFO L226 Difference]: Without dead ends: 31182 [2021-06-05 06:52:30,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:52:31,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31182 states. [2021-06-05 06:52:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31182 to 19797. [2021-06-05 06:52:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19797 states, 19796 states have (on average 3.8727015558698725) internal successors, (76664), 19796 states have internal predecessors, (76664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19797 states to 19797 states and 76664 transitions. [2021-06-05 06:52:31,429 INFO L78 Accepts]: Start accepts. Automaton has 19797 states and 76664 transitions. Word has length 28 [2021-06-05 06:52:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:31,429 INFO L482 AbstractCegarLoop]: Abstraction has 19797 states and 76664 transitions. [2021-06-05 06:52:31,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 19797 states and 76664 transitions. [2021-06-05 06:52:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:31,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:31,459 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:31,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-06-05 06:52:31,660 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:31,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-06-05 06:52:31,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:31,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896922134] [2021-06-05 06:52:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:31,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896922134] [2021-06-05 06:52:31,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896922134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:31,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518431592] [2021-06-05 06:52:31,693 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:31,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:31,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:31,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:31,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518431592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:31,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:31,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:52:31,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971915738] [2021-06-05 06:52:31,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:31,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:31,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:31,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:31,779 INFO L87 Difference]: Start difference. First operand 19797 states and 76664 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:32,535 INFO L93 Difference]: Finished difference Result 29369 states and 109123 transitions. [2021-06-05 06:52:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:52:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:32,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:32,601 INFO L225 Difference]: With dead ends: 29369 [2021-06-05 06:52:32,601 INFO L226 Difference]: Without dead ends: 29369 [2021-06-05 06:52:32,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:52:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29369 states. [2021-06-05 06:52:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29369 to 19845. [2021-06-05 06:52:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19845 states, 19844 states have (on average 3.871497681918968) internal successors, (76826), 19844 states have internal predecessors, (76826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19845 states to 19845 states and 76826 transitions. [2021-06-05 06:52:33,077 INFO L78 Accepts]: Start accepts. Automaton has 19845 states and 76826 transitions. Word has length 28 [2021-06-05 06:52:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:33,078 INFO L482 AbstractCegarLoop]: Abstraction has 19845 states and 76826 transitions. [2021-06-05 06:52:33,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19845 states and 76826 transitions. [2021-06-05 06:52:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:33,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:33,106 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:33,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3979,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:33,307 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:33,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:33,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-06-05 06:52:33,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:33,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922454231] [2021-06-05 06:52:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:33,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:33,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922454231] [2021-06-05 06:52:33,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922454231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:33,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530296168] [2021-06-05 06:52:33,340 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:33,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:52:33,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:33,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:33,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530296168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:33,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:33,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:52:33,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61136975] [2021-06-05 06:52:33,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:33,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:33,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:33,430 INFO L87 Difference]: Start difference. First operand 19845 states and 76826 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:34,325 INFO L93 Difference]: Finished difference Result 30894 states and 113497 transitions. [2021-06-05 06:52:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:52:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:34,390 INFO L225 Difference]: With dead ends: 30894 [2021-06-05 06:52:34,390 INFO L226 Difference]: Without dead ends: 30894 [2021-06-05 06:52:34,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:52:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30894 states. [2021-06-05 06:52:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30894 to 20391. [2021-06-05 06:52:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20391 states, 20390 states have (on average 3.8505640019617458) internal successors, (78513), 20390 states have internal predecessors, (78513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20391 states to 20391 states and 78513 transitions. [2021-06-05 06:52:34,900 INFO L78 Accepts]: Start accepts. Automaton has 20391 states and 78513 transitions. Word has length 28 [2021-06-05 06:52:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:34,900 INFO L482 AbstractCegarLoop]: Abstraction has 20391 states and 78513 transitions. [2021-06-05 06:52:34,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:34,901 INFO L276 IsEmpty]: Start isEmpty. Operand 20391 states and 78513 transitions. [2021-06-05 06:52:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:34,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:34,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:35,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3980 [2021-06-05 06:52:35,130 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:35,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-06-05 06:52:35,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:35,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107894650] [2021-06-05 06:52:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:35,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:35,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107894650] [2021-06-05 06:52:35,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107894650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:35,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502530906] [2021-06-05 06:52:35,162 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:35,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:35,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:35,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:35,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502530906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:35,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:35,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 06:52:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029841906] [2021-06-05 06:52:35,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:52:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:52:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:52:35,272 INFO L87 Difference]: Start difference. First operand 20391 states and 78513 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:36,071 INFO L93 Difference]: Finished difference Result 30020 states and 111194 transitions. [2021-06-05 06:52:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:52:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:36,139 INFO L225 Difference]: With dead ends: 30020 [2021-06-05 06:52:36,139 INFO L226 Difference]: Without dead ends: 30016 [2021-06-05 06:52:36,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:52:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30016 states. [2021-06-05 06:52:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30016 to 20283. [2021-06-05 06:52:36,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20283 states, 20282 states have (on average 3.8532196035893898) internal successors, (78151), 20282 states have internal predecessors, (78151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20283 states to 20283 states and 78151 transitions. [2021-06-05 06:52:36,706 INFO L78 Accepts]: Start accepts. Automaton has 20283 states and 78151 transitions. Word has length 28 [2021-06-05 06:52:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:36,706 INFO L482 AbstractCegarLoop]: Abstraction has 20283 states and 78151 transitions. [2021-06-05 06:52:36,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 20283 states and 78151 transitions. [2021-06-05 06:52:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:36,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:36,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:36,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:36,935 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-06-05 06:52:36,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:36,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543181064] [2021-06-05 06:52:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:36,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:36,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543181064] [2021-06-05 06:52:36,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543181064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:36,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14114803] [2021-06-05 06:52:36,960 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:36,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:36,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:52:37,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14114803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:37,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:37,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 06:52:37,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176691214] [2021-06-05 06:52:37,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:52:37,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:37,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:52:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:37,029 INFO L87 Difference]: Start difference. First operand 20283 states and 78151 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:37,260 INFO L93 Difference]: Finished difference Result 25295 states and 94083 transitions. [2021-06-05 06:52:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:52:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:37,323 INFO L225 Difference]: With dead ends: 25295 [2021-06-05 06:52:37,323 INFO L226 Difference]: Without dead ends: 25295 [2021-06-05 06:52:37,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25295 states. [2021-06-05 06:52:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25295 to 20593. [2021-06-05 06:52:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20593 states, 20592 states have (on average 3.8444055944055946) internal successors, (79164), 20592 states have internal predecessors, (79164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20593 states to 20593 states and 79164 transitions. [2021-06-05 06:52:37,735 INFO L78 Accepts]: Start accepts. Automaton has 20593 states and 79164 transitions. Word has length 28 [2021-06-05 06:52:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:37,735 INFO L482 AbstractCegarLoop]: Abstraction has 20593 states and 79164 transitions. [2021-06-05 06:52:37,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20593 states and 79164 transitions. [2021-06-05 06:52:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:37,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:37,764 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:37,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3982,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:37,965 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:37,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:37,965 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-06-05 06:52:37,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:37,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445088472] [2021-06-05 06:52:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:37,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445088472] [2021-06-05 06:52:37,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445088472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:37,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077084867] [2021-06-05 06:52:37,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:38,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:38,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:52:38,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077084867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:38,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:38,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:52:38,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5493066] [2021-06-05 06:52:38,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:38,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:38,078 INFO L87 Difference]: Start difference. First operand 20593 states and 79164 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:38,820 INFO L93 Difference]: Finished difference Result 31016 states and 113583 transitions. [2021-06-05 06:52:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:52:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:38,890 INFO L225 Difference]: With dead ends: 31016 [2021-06-05 06:52:38,890 INFO L226 Difference]: Without dead ends: 31016 [2021-06-05 06:52:38,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:52:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31016 states. [2021-06-05 06:52:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31016 to 22203. [2021-06-05 06:52:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 22202 states have (on average 3.856454373479867) internal successors, (85621), 22202 states have internal predecessors, (85621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 85621 transitions. [2021-06-05 06:52:39,387 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 85621 transitions. Word has length 28 [2021-06-05 06:52:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:39,387 INFO L482 AbstractCegarLoop]: Abstraction has 22203 states and 85621 transitions. [2021-06-05 06:52:39,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 85621 transitions. [2021-06-05 06:52:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:39,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:39,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:39,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:39,618 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:39,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-06-05 06:52:39,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:39,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630677905] [2021-06-05 06:52:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:39,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:39,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630677905] [2021-06-05 06:52:39,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630677905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:39,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052849205] [2021-06-05 06:52:39,651 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:39,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:39,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:52:39,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052849205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:39,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:39,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:52:39,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458525647] [2021-06-05 06:52:39,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:39,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:39,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:39,725 INFO L87 Difference]: Start difference. First operand 22203 states and 85621 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:40,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:40,322 INFO L93 Difference]: Finished difference Result 29255 states and 109041 transitions. [2021-06-05 06:52:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:52:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:40,388 INFO L225 Difference]: With dead ends: 29255 [2021-06-05 06:52:40,388 INFO L226 Difference]: Without dead ends: 29243 [2021-06-05 06:52:40,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:52:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29243 states. [2021-06-05 06:52:40,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29243 to 22351. [2021-06-05 06:52:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22351 states, 22350 states have (on average 3.8510514541387026) internal successors, (86071), 22350 states have internal predecessors, (86071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22351 states to 22351 states and 86071 transitions. [2021-06-05 06:52:40,950 INFO L78 Accepts]: Start accepts. Automaton has 22351 states and 86071 transitions. Word has length 28 [2021-06-05 06:52:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:40,950 INFO L482 AbstractCegarLoop]: Abstraction has 22351 states and 86071 transitions. [2021-06-05 06:52:40,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 22351 states and 86071 transitions. [2021-06-05 06:52:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:40,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:40,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:41,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3984,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:41,183 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:41,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:41,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-06-05 06:52:41,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:41,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954340671] [2021-06-05 06:52:41,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:41,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:41,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:41,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954340671] [2021-06-05 06:52:41,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954340671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:41,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389276249] [2021-06-05 06:52:41,210 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:41,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:41,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:41,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:52:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:41,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389276249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:41,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:41,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 06:52:41,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860095373] [2021-06-05 06:52:41,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:52:41,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:52:41,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:52:41,279 INFO L87 Difference]: Start difference. First operand 22351 states and 86071 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:41,501 INFO L93 Difference]: Finished difference Result 25610 states and 97028 transitions. [2021-06-05 06:52:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:52:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:41,559 INFO L225 Difference]: With dead ends: 25610 [2021-06-05 06:52:41,560 INFO L226 Difference]: Without dead ends: 25610 [2021-06-05 06:52:41,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:52:41,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25610 states. [2021-06-05 06:52:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25610 to 23154. [2021-06-05 06:52:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23154 states, 23153 states have (on average 3.8461538461538463) internal successors, (89050), 23153 states have internal predecessors, (89050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23154 states to 23154 states and 89050 transitions. [2021-06-05 06:52:41,979 INFO L78 Accepts]: Start accepts. Automaton has 23154 states and 89050 transitions. Word has length 28 [2021-06-05 06:52:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:41,979 INFO L482 AbstractCegarLoop]: Abstraction has 23154 states and 89050 transitions. [2021-06-05 06:52:41,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 23154 states and 89050 transitions. [2021-06-05 06:52:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:42,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:42,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:42,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:42,215 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-06-05 06:52:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:42,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131672402] [2021-06-05 06:52:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:42,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:42,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131672402] [2021-06-05 06:52:42,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131672402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:42,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905935968] [2021-06-05 06:52:42,252 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:42,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:52:42,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:42,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905935968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:42,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:42,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:52:42,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782738962] [2021-06-05 06:52:42,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:42,331 INFO L87 Difference]: Start difference. First operand 23154 states and 89050 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:43,008 INFO L93 Difference]: Finished difference Result 30991 states and 114399 transitions. [2021-06-05 06:52:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:52:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:43,076 INFO L225 Difference]: With dead ends: 30991 [2021-06-05 06:52:43,076 INFO L226 Difference]: Without dead ends: 30991 [2021-06-05 06:52:43,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:52:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30991 states. [2021-06-05 06:52:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30991 to 24366. [2021-06-05 06:52:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24366 states, 24365 states have (on average 3.8139134003693824) internal successors, (92926), 24365 states have internal predecessors, (92926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24366 states to 24366 states and 92926 transitions. [2021-06-05 06:52:43,611 INFO L78 Accepts]: Start accepts. Automaton has 24366 states and 92926 transitions. Word has length 28 [2021-06-05 06:52:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:43,611 INFO L482 AbstractCegarLoop]: Abstraction has 24366 states and 92926 transitions. [2021-06-05 06:52:43,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 24366 states and 92926 transitions. [2021-06-05 06:52:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:43,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:43,651 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:43,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3986,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:43,851 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:43,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-06-05 06:52:43,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:43,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268705516] [2021-06-05 06:52:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:43,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:43,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268705516] [2021-06-05 06:52:43,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268705516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:43,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463980089] [2021-06-05 06:52:43,885 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:43,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:43,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:44,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463980089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:44,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:44,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:44,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316918156] [2021-06-05 06:52:44,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:44,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:44,001 INFO L87 Difference]: Start difference. First operand 24366 states and 92926 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:44,637 INFO L93 Difference]: Finished difference Result 30092 states and 112016 transitions. [2021-06-05 06:52:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:52:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:44,708 INFO L225 Difference]: With dead ends: 30092 [2021-06-05 06:52:44,708 INFO L226 Difference]: Without dead ends: 30084 [2021-06-05 06:52:44,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:52:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30084 states. [2021-06-05 06:52:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30084 to 24188. [2021-06-05 06:52:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24188 states, 24187 states have (on average 3.820027287385786) internal successors, (92395), 24187 states have internal predecessors, (92395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24188 states to 24188 states and 92395 transitions. [2021-06-05 06:52:45,228 INFO L78 Accepts]: Start accepts. Automaton has 24188 states and 92395 transitions. Word has length 28 [2021-06-05 06:52:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:45,228 INFO L482 AbstractCegarLoop]: Abstraction has 24188 states and 92395 transitions. [2021-06-05 06:52:45,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24188 states and 92395 transitions. [2021-06-05 06:52:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:45,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:45,265 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:45,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3987,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:45,466 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:45,466 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-06-05 06:52:45,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:45,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078738339] [2021-06-05 06:52:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:45,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078738339] [2021-06-05 06:52:45,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078738339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189756146] [2021-06-05 06:52:45,500 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:45,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:52:45,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:45,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189756146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:45,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:45,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:45,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214759514] [2021-06-05 06:52:45,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:45,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:45,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:45,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:45,619 INFO L87 Difference]: Start difference. First operand 24188 states and 92395 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:46,287 INFO L93 Difference]: Finished difference Result 31919 states and 117608 transitions. [2021-06-05 06:52:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:52:46,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:46,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:46,364 INFO L225 Difference]: With dead ends: 31919 [2021-06-05 06:52:46,364 INFO L226 Difference]: Without dead ends: 31919 [2021-06-05 06:52:46,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:52:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31919 states. [2021-06-05 06:52:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31919 to 25212. [2021-06-05 06:52:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25212 states, 25211 states have (on average 3.796160406171909) internal successors, (95705), 25211 states have internal predecessors, (95705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25212 states to 25212 states and 95705 transitions. [2021-06-05 06:52:46,968 INFO L78 Accepts]: Start accepts. Automaton has 25212 states and 95705 transitions. Word has length 28 [2021-06-05 06:52:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:46,968 INFO L482 AbstractCegarLoop]: Abstraction has 25212 states and 95705 transitions. [2021-06-05 06:52:46,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25212 states and 95705 transitions. [2021-06-05 06:52:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:47,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:47,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:47,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3988,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:47,207 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:47,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:47,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-06-05 06:52:47,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:47,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960438005] [2021-06-05 06:52:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:47,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960438005] [2021-06-05 06:52:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960438005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977865180] [2021-06-05 06:52:47,251 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:47,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:52:47,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:47,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977865180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:47,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:47,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:52:47,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606919672] [2021-06-05 06:52:47,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:47,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:47,335 INFO L87 Difference]: Start difference. First operand 25212 states and 95705 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:47,742 INFO L93 Difference]: Finished difference Result 30875 states and 116320 transitions. [2021-06-05 06:52:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:52:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:47,824 INFO L225 Difference]: With dead ends: 30875 [2021-06-05 06:52:47,825 INFO L226 Difference]: Without dead ends: 30862 [2021-06-05 06:52:47,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:52:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30862 states. [2021-06-05 06:52:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30862 to 29308. [2021-06-05 06:52:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29308 states, 29307 states have (on average 3.8146517896748215) internal successors, (111796), 29307 states have internal predecessors, (111796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29308 states to 29308 states and 111796 transitions. [2021-06-05 06:52:48,586 INFO L78 Accepts]: Start accepts. Automaton has 29308 states and 111796 transitions. Word has length 28 [2021-06-05 06:52:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:48,586 INFO L482 AbstractCegarLoop]: Abstraction has 29308 states and 111796 transitions. [2021-06-05 06:52:48,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 29308 states and 111796 transitions. [2021-06-05 06:52:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:48,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:48,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:48,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3989,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:48,837 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-06-05 06:52:48,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:48,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346445851] [2021-06-05 06:52:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:48,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:48,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346445851] [2021-06-05 06:52:48,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346445851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234068575] [2021-06-05 06:52:48,878 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:48,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234068575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:48,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:48,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:52:48,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525765312] [2021-06-05 06:52:48,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:48,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:48,944 INFO L87 Difference]: Start difference. First operand 29308 states and 111796 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:49,257 INFO L93 Difference]: Finished difference Result 32311 states and 121127 transitions. [2021-06-05 06:52:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:52:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:49,337 INFO L225 Difference]: With dead ends: 32311 [2021-06-05 06:52:49,337 INFO L226 Difference]: Without dead ends: 32311 [2021-06-05 06:52:49,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:52:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32311 states. [2021-06-05 06:52:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32311 to 29053. [2021-06-05 06:52:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29053 states, 29052 states have (on average 3.81099407958144) internal successors, (110717), 29052 states have internal predecessors, (110717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29053 states to 29053 states and 110717 transitions. [2021-06-05 06:52:49,934 INFO L78 Accepts]: Start accepts. Automaton has 29053 states and 110717 transitions. Word has length 28 [2021-06-05 06:52:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:49,934 INFO L482 AbstractCegarLoop]: Abstraction has 29053 states and 110717 transitions. [2021-06-05 06:52:49,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29053 states and 110717 transitions. [2021-06-05 06:52:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:49,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:49,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:50,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3990 [2021-06-05 06:52:50,177 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-06-05 06:52:50,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:50,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901761386] [2021-06-05 06:52:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:50,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:50,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901761386] [2021-06-05 06:52:50,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901761386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278380447] [2021-06-05 06:52:50,206 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:50,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:52:50,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:50,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:50,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278380447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:50,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:50,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:50,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629739664] [2021-06-05 06:52:50,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:50,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:50,280 INFO L87 Difference]: Start difference. First operand 29053 states and 110717 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:50,830 INFO L93 Difference]: Finished difference Result 35470 states and 132021 transitions. [2021-06-05 06:52:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:52:50,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:50,913 INFO L225 Difference]: With dead ends: 35470 [2021-06-05 06:52:50,914 INFO L226 Difference]: Without dead ends: 35462 [2021-06-05 06:52:50,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:52:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35462 states. [2021-06-05 06:52:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35462 to 29019. [2021-06-05 06:52:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29019 states, 29018 states have (on average 3.8114273898959268) internal successors, (110600), 29018 states have internal predecessors, (110600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29019 states to 29019 states and 110600 transitions. [2021-06-05 06:52:51,581 INFO L78 Accepts]: Start accepts. Automaton has 29019 states and 110600 transitions. Word has length 28 [2021-06-05 06:52:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:51,581 INFO L482 AbstractCegarLoop]: Abstraction has 29019 states and 110600 transitions. [2021-06-05 06:52:51,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 29019 states and 110600 transitions. [2021-06-05 06:52:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:51,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:51,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:51,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3991 [2021-06-05 06:52:51,828 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-06-05 06:52:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:51,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118219061] [2021-06-05 06:52:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:51,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:51,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118219061] [2021-06-05 06:52:51,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118219061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:51,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870922502] [2021-06-05 06:52:51,858 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:51,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:52:51,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:51,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:51,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870922502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:51,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:51,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 06:52:51,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842477446] [2021-06-05 06:52:51,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:52:51,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:52:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:52:51,930 INFO L87 Difference]: Start difference. First operand 29019 states and 110600 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:52,146 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-06-05 06:52:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:52,433 INFO L93 Difference]: Finished difference Result 31865 states and 120062 transitions. [2021-06-05 06:52:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:52:52,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:52,512 INFO L225 Difference]: With dead ends: 31865 [2021-06-05 06:52:52,512 INFO L226 Difference]: Without dead ends: 31865 [2021-06-05 06:52:52,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:52:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31865 states. [2021-06-05 06:52:53,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31865 to 29551. [2021-06-05 06:52:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29551 states, 29550 states have (on average 3.8099492385786804) internal successors, (112584), 29550 states have internal predecessors, (112584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29551 states to 29551 states and 112584 transitions. [2021-06-05 06:52:53,233 INFO L78 Accepts]: Start accepts. Automaton has 29551 states and 112584 transitions. Word has length 28 [2021-06-05 06:52:53,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:53,233 INFO L482 AbstractCegarLoop]: Abstraction has 29551 states and 112584 transitions. [2021-06-05 06:52:53,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:53,234 INFO L276 IsEmpty]: Start isEmpty. Operand 29551 states and 112584 transitions. [2021-06-05 06:52:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:53,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:53,280 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:53,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:53,480 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-06-05 06:52:53,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:53,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164854601] [2021-06-05 06:52:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:53,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:53,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164854601] [2021-06-05 06:52:53,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164854601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:53,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229561642] [2021-06-05 06:52:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:53,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:52:53,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:53,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:52:53,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229561642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:53,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:53,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 06:52:53,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706602044] [2021-06-05 06:52:53,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:53,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:53,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:53,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:53,600 INFO L87 Difference]: Start difference. First operand 29551 states and 112584 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:54,143 INFO L93 Difference]: Finished difference Result 36395 states and 135424 transitions. [2021-06-05 06:52:54,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:52:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:54,225 INFO L225 Difference]: With dead ends: 36395 [2021-06-05 06:52:54,225 INFO L226 Difference]: Without dead ends: 36371 [2021-06-05 06:52:54,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:52:54,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36371 states. [2021-06-05 06:52:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36371 to 29723. [2021-06-05 06:52:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29723 states, 29722 states have (on average 3.8058677074221117) internal successors, (113118), 29722 states have internal predecessors, (113118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29723 states to 29723 states and 113118 transitions. [2021-06-05 06:52:54,873 INFO L78 Accepts]: Start accepts. Automaton has 29723 states and 113118 transitions. Word has length 28 [2021-06-05 06:52:54,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:54,873 INFO L482 AbstractCegarLoop]: Abstraction has 29723 states and 113118 transitions. [2021-06-05 06:52:54,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29723 states and 113118 transitions. [2021-06-05 06:52:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:54,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:54,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:55,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:55,122 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-06-05 06:52:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:55,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817034370] [2021-06-05 06:52:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:55,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:55,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817034370] [2021-06-05 06:52:55,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817034370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:55,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570763052] [2021-06-05 06:52:55,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:55,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:52:55,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:52:55,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:55,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570763052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:55,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:55,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 06:52:55,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536197482] [2021-06-05 06:52:55,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:52:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:52:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:52:55,225 INFO L87 Difference]: Start difference. First operand 29723 states and 113118 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:55,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:55,649 INFO L93 Difference]: Finished difference Result 32279 states and 121530 transitions. [2021-06-05 06:52:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:52:55,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:55,724 INFO L225 Difference]: With dead ends: 32279 [2021-06-05 06:52:55,724 INFO L226 Difference]: Without dead ends: 32279 [2021-06-05 06:52:55,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:52:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32279 states. [2021-06-05 06:52:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32279 to 29649. [2021-06-05 06:52:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29649 states, 29648 states have (on average 3.8067323259579062) internal successors, (112862), 29648 states have internal predecessors, (112862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29649 states to 29649 states and 112862 transitions. [2021-06-05 06:52:56,572 INFO L78 Accepts]: Start accepts. Automaton has 29649 states and 112862 transitions. Word has length 28 [2021-06-05 06:52:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:56,572 INFO L482 AbstractCegarLoop]: Abstraction has 29649 states and 112862 transitions. [2021-06-05 06:52:56,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 29649 states and 112862 transitions. [2021-06-05 06:52:56,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:56,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:56,619 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:56,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:56,820 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:56,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:56,820 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-06-05 06:52:56,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:56,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526709304] [2021-06-05 06:52:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:56,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526709304] [2021-06-05 06:52:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526709304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713445553] [2021-06-05 06:52:56,855 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:56,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:52:56,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:52:56,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:56,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:56,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713445553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:56,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:56,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:52:56,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832074737] [2021-06-05 06:52:56,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:52:56,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:56,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:52:56,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:52:56,942 INFO L87 Difference]: Start difference. First operand 29649 states and 112862 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:52:57,585 INFO L93 Difference]: Finished difference Result 36318 states and 135165 transitions. [2021-06-05 06:52:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:52:57,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:52:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:52:57,669 INFO L225 Difference]: With dead ends: 36318 [2021-06-05 06:52:57,669 INFO L226 Difference]: Without dead ends: 36278 [2021-06-05 06:52:57,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:52:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36278 states. [2021-06-05 06:52:58,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36278 to 29805. [2021-06-05 06:52:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29805 states, 29804 states have (on average 3.80284525567038) internal successors, (113340), 29804 states have internal predecessors, (113340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29805 states to 29805 states and 113340 transitions. [2021-06-05 06:52:58,505 INFO L78 Accepts]: Start accepts. Automaton has 29805 states and 113340 transitions. Word has length 28 [2021-06-05 06:52:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:52:58,505 INFO L482 AbstractCegarLoop]: Abstraction has 29805 states and 113340 transitions. [2021-06-05 06:52:58,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:52:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 29805 states and 113340 transitions. [2021-06-05 06:52:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:52:58,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:52:58,692 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:52:58,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:58,892 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:52:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:52:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-06-05 06:52:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:52:58,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994169766] [2021-06-05 06:52:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:52:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:58,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:52:58,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994169766] [2021-06-05 06:52:58,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994169766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:58,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780667506] [2021-06-05 06:52:58,921 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:52:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:52:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:52:58,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:52:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:52:59,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780667506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:52:59,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:52:59,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:52:59,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702444931] [2021-06-05 06:52:59,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:52:59,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:52:59,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:52:59,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:52:59,031 INFO L87 Difference]: Start difference. First operand 29805 states and 113340 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:00,204 INFO L93 Difference]: Finished difference Result 68211 states and 251076 transitions. [2021-06-05 06:53:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:53:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:00,374 INFO L225 Difference]: With dead ends: 68211 [2021-06-05 06:53:00,374 INFO L226 Difference]: Without dead ends: 68211 [2021-06-05 06:53:00,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:53:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68211 states. [2021-06-05 06:53:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68211 to 37529. [2021-06-05 06:53:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37529 states, 37528 states have (on average 3.8846727776593477) internal successors, (145784), 37528 states have internal predecessors, (145784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37529 states to 37529 states and 145784 transitions. [2021-06-05 06:53:01,809 INFO L78 Accepts]: Start accepts. Automaton has 37529 states and 145784 transitions. Word has length 28 [2021-06-05 06:53:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:01,809 INFO L482 AbstractCegarLoop]: Abstraction has 37529 states and 145784 transitions. [2021-06-05 06:53:01,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 37529 states and 145784 transitions. [2021-06-05 06:53:01,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:01,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:01,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:02,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3996,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:02,068 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-06-05 06:53:02,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:02,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726580854] [2021-06-05 06:53:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726580854] [2021-06-05 06:53:02,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726580854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523218424] [2021-06-05 06:53:02,096 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:02,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:02,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:02,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:02,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:02,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523218424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:02,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:02,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:53:02,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731224263] [2021-06-05 06:53:02,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:02,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:02,206 INFO L87 Difference]: Start difference. First operand 37529 states and 145784 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:02,713 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 06:53:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:03,719 INFO L93 Difference]: Finished difference Result 67584 states and 249415 transitions. [2021-06-05 06:53:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:53:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:03,893 INFO L225 Difference]: With dead ends: 67584 [2021-06-05 06:53:03,893 INFO L226 Difference]: Without dead ends: 67584 [2021-06-05 06:53:03,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 790.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:53:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67584 states. [2021-06-05 06:53:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67584 to 37526. [2021-06-05 06:53:05,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37526 states, 37525 states have (on average 3.884610259826782) internal successors, (145770), 37525 states have internal predecessors, (145770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37526 states to 37526 states and 145770 transitions. [2021-06-05 06:53:05,490 INFO L78 Accepts]: Start accepts. Automaton has 37526 states and 145770 transitions. Word has length 28 [2021-06-05 06:53:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:05,490 INFO L482 AbstractCegarLoop]: Abstraction has 37526 states and 145770 transitions. [2021-06-05 06:53:05,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37526 states and 145770 transitions. [2021-06-05 06:53:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:05,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:05,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:05,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:05,792 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-06-05 06:53:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:05,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553675032] [2021-06-05 06:53:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:05,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:05,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553675032] [2021-06-05 06:53:05,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553675032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682952523] [2021-06-05 06:53:05,828 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:05,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:53:05,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:05,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682952523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:05,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:05,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:53:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045471643] [2021-06-05 06:53:05,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:53:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:53:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:53:05,931 INFO L87 Difference]: Start difference. First operand 37526 states and 145770 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:07,120 INFO L93 Difference]: Finished difference Result 62987 states and 233868 transitions. [2021-06-05 06:53:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:53:07,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:07,446 INFO L225 Difference]: With dead ends: 62987 [2021-06-05 06:53:07,447 INFO L226 Difference]: Without dead ends: 62987 [2021-06-05 06:53:07,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:53:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62987 states. [2021-06-05 06:53:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62987 to 37548. [2021-06-05 06:53:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8849175699789598) internal successors, (145867), 37547 states have internal predecessors, (145867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145867 transitions. [2021-06-05 06:53:08,801 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145867 transitions. Word has length 28 [2021-06-05 06:53:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:08,801 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145867 transitions. [2021-06-05 06:53:08,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:08,801 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145867 transitions. [2021-06-05 06:53:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:08,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:08,858 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:09,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3998,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:09,059 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-06-05 06:53:09,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:09,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517974001] [2021-06-05 06:53:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:09,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517974001] [2021-06-05 06:53:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517974001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755484320] [2021-06-05 06:53:09,087 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:09,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:09,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:09,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755484320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:09,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:09,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:53:09,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748974071] [2021-06-05 06:53:09,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:53:09,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:09,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:53:09,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:53:09,186 INFO L87 Difference]: Start difference. First operand 37548 states and 145867 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:10,417 INFO L93 Difference]: Finished difference Result 62120 states and 231628 transitions. [2021-06-05 06:53:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:53:10,417 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:10,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:10,823 INFO L225 Difference]: With dead ends: 62120 [2021-06-05 06:53:10,824 INFO L226 Difference]: Without dead ends: 62112 [2021-06-05 06:53:10,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:53:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62112 states. [2021-06-05 06:53:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62112 to 37548. [2021-06-05 06:53:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37548 states, 37547 states have (on average 3.8847577702612726) internal successors, (145861), 37547 states have internal predecessors, (145861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37548 states to 37548 states and 145861 transitions. [2021-06-05 06:53:12,298 INFO L78 Accepts]: Start accepts. Automaton has 37548 states and 145861 transitions. Word has length 28 [2021-06-05 06:53:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:12,299 INFO L482 AbstractCegarLoop]: Abstraction has 37548 states and 145861 transitions. [2021-06-05 06:53:12,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 37548 states and 145861 transitions. [2021-06-05 06:53:12,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:12,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:12,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:12,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-05 06:53:12,606 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:12,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:12,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-06-05 06:53:12,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:12,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900485821] [2021-06-05 06:53:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:12,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900485821] [2021-06-05 06:53:12,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900485821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119378084] [2021-06-05 06:53:12,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:12,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:12,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119378084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:12,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:12,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:53:12,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465811489] [2021-06-05 06:53:12,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:12,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:12,749 INFO L87 Difference]: Start difference. First operand 37548 states and 145861 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:13,999 INFO L93 Difference]: Finished difference Result 61801 states and 230767 transitions. [2021-06-05 06:53:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:53:14,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:14,164 INFO L225 Difference]: With dead ends: 61801 [2021-06-05 06:53:14,164 INFO L226 Difference]: Without dead ends: 61801 [2021-06-05 06:53:14,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:53:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61801 states. [2021-06-05 06:53:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61801 to 37556. [2021-06-05 06:53:15,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884835574490747) internal successors, (145895), 37555 states have internal predecessors, (145895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145895 transitions. [2021-06-05 06:53:15,308 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145895 transitions. Word has length 28 [2021-06-05 06:53:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:15,308 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145895 transitions. [2021-06-05 06:53:15,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145895 transitions. [2021-06-05 06:53:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:15,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:15,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:15,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-06-05 06:53:15,817 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-06-05 06:53:15,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:15,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305913728] [2021-06-05 06:53:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:15,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:15,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305913728] [2021-06-05 06:53:15,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305913728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:15,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39139651] [2021-06-05 06:53:15,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:15,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:53:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:15,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:15,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39139651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:15,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:15,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:53:15,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012116836] [2021-06-05 06:53:15,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:15,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:15,966 INFO L87 Difference]: Start difference. First operand 37556 states and 145895 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:17,065 INFO L93 Difference]: Finished difference Result 61590 states and 230241 transitions. [2021-06-05 06:53:17,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:53:17,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:17,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:17,249 INFO L225 Difference]: With dead ends: 61590 [2021-06-05 06:53:17,249 INFO L226 Difference]: Without dead ends: 61582 [2021-06-05 06:53:17,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 491.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:53:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61582 states. [2021-06-05 06:53:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61582 to 37556. [2021-06-05 06:53:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37555 states have (on average 3.884782319265078) internal successors, (145893), 37555 states have internal predecessors, (145893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 145893 transitions. [2021-06-05 06:53:18,565 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 145893 transitions. Word has length 28 [2021-06-05 06:53:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:18,565 INFO L482 AbstractCegarLoop]: Abstraction has 37556 states and 145893 transitions. [2021-06-05 06:53:18,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 145893 transitions. [2021-06-05 06:53:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:18,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:18,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:18,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-05 06:53:18,824 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-06-05 06:53:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:18,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763713002] [2021-06-05 06:53:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:18,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763713002] [2021-06-05 06:53:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763713002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:18,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278185192] [2021-06-05 06:53:18,854 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:18,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:18,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278185192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:18,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:18,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:53:18,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20543547] [2021-06-05 06:53:18,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:18,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:18,946 INFO L87 Difference]: Start difference. First operand 37556 states and 145893 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:20,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:20,211 INFO L93 Difference]: Finished difference Result 60972 states and 226630 transitions. [2021-06-05 06:53:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:53:20,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:20,371 INFO L225 Difference]: With dead ends: 60972 [2021-06-05 06:53:20,371 INFO L226 Difference]: Without dead ends: 60972 [2021-06-05 06:53:20,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:53:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60972 states. [2021-06-05 06:53:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60972 to 40355. [2021-06-05 06:53:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40355 states, 40354 states have (on average 3.8889081627595776) internal successors, (156933), 40354 states have internal predecessors, (156933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40355 states to 40355 states and 156933 transitions. [2021-06-05 06:53:22,068 INFO L78 Accepts]: Start accepts. Automaton has 40355 states and 156933 transitions. Word has length 28 [2021-06-05 06:53:22,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:22,068 INFO L482 AbstractCegarLoop]: Abstraction has 40355 states and 156933 transitions. [2021-06-05 06:53:22,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 40355 states and 156933 transitions. [2021-06-05 06:53:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:22,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:22,151 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:22,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4002 [2021-06-05 06:53:22,352 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-06-05 06:53:22,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:22,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241293054] [2021-06-05 06:53:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:22,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:22,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241293054] [2021-06-05 06:53:22,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241293054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:22,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669319425] [2021-06-05 06:53:22,381 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:22,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:22,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:22,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:22,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:22,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669319425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:22,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:22,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:53:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424338311] [2021-06-05 06:53:22,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:22,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:22,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:22,471 INFO L87 Difference]: Start difference. First operand 40355 states and 156933 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:23,405 INFO L93 Difference]: Finished difference Result 60488 states and 225357 transitions. [2021-06-05 06:53:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:53:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:23,568 INFO L225 Difference]: With dead ends: 60488 [2021-06-05 06:53:23,568 INFO L226 Difference]: Without dead ends: 60480 [2021-06-05 06:53:23,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:53:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60480 states. [2021-06-05 06:53:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60480 to 40081. [2021-06-05 06:53:24,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40081 states, 40080 states have (on average 3.8941616766467066) internal successors, (156078), 40080 states have internal predecessors, (156078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40081 states to 40081 states and 156078 transitions. [2021-06-05 06:53:24,973 INFO L78 Accepts]: Start accepts. Automaton has 40081 states and 156078 transitions. Word has length 28 [2021-06-05 06:53:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:24,973 INFO L482 AbstractCegarLoop]: Abstraction has 40081 states and 156078 transitions. [2021-06-05 06:53:24,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 40081 states and 156078 transitions. [2021-06-05 06:53:25,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:25,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:25,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:25,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4003,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:25,240 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:25,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-06-05 06:53:25,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:25,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694792527] [2021-06-05 06:53:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:25,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:25,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694792527] [2021-06-05 06:53:25,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694792527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:25,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965508469] [2021-06-05 06:53:25,282 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:25,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:53:25,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:25,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965508469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:25,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:53:25,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708099393] [2021-06-05 06:53:25,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:25,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:25,377 INFO L87 Difference]: Start difference. First operand 40081 states and 156078 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:26,427 INFO L93 Difference]: Finished difference Result 59033 states and 221360 transitions. [2021-06-05 06:53:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:53:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:26,654 INFO L225 Difference]: With dead ends: 59033 [2021-06-05 06:53:26,654 INFO L226 Difference]: Without dead ends: 59009 [2021-06-05 06:53:26,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:53:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2021-06-05 06:53:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 39991. [2021-06-05 06:53:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39991 states, 39990 states have (on average 3.893998499624906) internal successors, (155721), 39990 states have internal predecessors, (155721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39991 states to 39991 states and 155721 transitions. [2021-06-05 06:53:28,052 INFO L78 Accepts]: Start accepts. Automaton has 39991 states and 155721 transitions. Word has length 28 [2021-06-05 06:53:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:28,052 INFO L482 AbstractCegarLoop]: Abstraction has 39991 states and 155721 transitions. [2021-06-05 06:53:28,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39991 states and 155721 transitions. [2021-06-05 06:53:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:28,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:28,113 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:28,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:28,314 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:28,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-06-05 06:53:28,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:28,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873301275] [2021-06-05 06:53:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:53:28,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:28,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873301275] [2021-06-05 06:53:28,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873301275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:28,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136474220] [2021-06-05 06:53:28,343 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:28,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:28,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:28,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:28,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136474220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:28,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:28,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:53:28,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993515112] [2021-06-05 06:53:28,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:28,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:28,452 INFO L87 Difference]: Start difference. First operand 39991 states and 155721 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:29,749 INFO L93 Difference]: Finished difference Result 60273 states and 224760 transitions. [2021-06-05 06:53:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 06:53:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:29,904 INFO L225 Difference]: With dead ends: 60273 [2021-06-05 06:53:29,904 INFO L226 Difference]: Without dead ends: 60273 [2021-06-05 06:53:29,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:53:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60273 states. [2021-06-05 06:53:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60273 to 40087. [2021-06-05 06:53:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40087 states, 40086 states have (on average 3.892506111859502) internal successors, (156035), 40086 states have internal predecessors, (156035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40087 states to 40087 states and 156035 transitions. [2021-06-05 06:53:31,141 INFO L78 Accepts]: Start accepts. Automaton has 40087 states and 156035 transitions. Word has length 28 [2021-06-05 06:53:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:31,141 INFO L482 AbstractCegarLoop]: Abstraction has 40087 states and 156035 transitions. [2021-06-05 06:53:31,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 40087 states and 156035 transitions. [2021-06-05 06:53:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:31,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:31,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:31,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4005,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:31,402 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-06-05 06:53:31,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:31,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283540817] [2021-06-05 06:53:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:53:31,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:31,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283540817] [2021-06-05 06:53:31,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283540817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:31,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90013853] [2021-06-05 06:53:31,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:31,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:31,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:31,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:31,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90013853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:31,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:31,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:53:31,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107478008] [2021-06-05 06:53:31,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:31,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:31,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:31,536 INFO L87 Difference]: Start difference. First operand 40087 states and 156035 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:32,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:32,759 INFO L93 Difference]: Finished difference Result 59960 states and 223872 transitions. [2021-06-05 06:53:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:53:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:32,927 INFO L225 Difference]: With dead ends: 59960 [2021-06-05 06:53:32,927 INFO L226 Difference]: Without dead ends: 59952 [2021-06-05 06:53:32,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:53:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59952 states. [2021-06-05 06:53:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59952 to 40019. [2021-06-05 06:53:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40019 states, 40018 states have (on average 3.893822779749113) internal successors, (155823), 40018 states have internal predecessors, (155823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40019 states to 40019 states and 155823 transitions. [2021-06-05 06:53:34,300 INFO L78 Accepts]: Start accepts. Automaton has 40019 states and 155823 transitions. Word has length 28 [2021-06-05 06:53:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:34,300 INFO L482 AbstractCegarLoop]: Abstraction has 40019 states and 155823 transitions. [2021-06-05 06:53:34,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 40019 states and 155823 transitions. [2021-06-05 06:53:34,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:34,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:34,361 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:34,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4006,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:34,561 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-06-05 06:53:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:34,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927130237] [2021-06-05 06:53:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:53:34,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:34,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927130237] [2021-06-05 06:53:34,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927130237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:34,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859812828] [2021-06-05 06:53:34,591 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:34,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:34,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859812828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:34,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:34,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:53:34,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877707903] [2021-06-05 06:53:34,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:53:34,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:34,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:53:34,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:53:34,687 INFO L87 Difference]: Start difference. First operand 40019 states and 155823 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:35,674 INFO L93 Difference]: Finished difference Result 58691 states and 220361 transitions. [2021-06-05 06:53:35,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:53:35,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:35,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:35,829 INFO L225 Difference]: With dead ends: 58691 [2021-06-05 06:53:35,829 INFO L226 Difference]: Without dead ends: 58667 [2021-06-05 06:53:35,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:53:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58667 states. [2021-06-05 06:53:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58667 to 39995. [2021-06-05 06:53:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39995 states, 39994 states have (on average 3.89395909386408) internal successors, (155735), 39994 states have internal predecessors, (155735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39995 states to 39995 states and 155735 transitions. [2021-06-05 06:53:37,130 INFO L78 Accepts]: Start accepts. Automaton has 39995 states and 155735 transitions. Word has length 28 [2021-06-05 06:53:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:37,130 INFO L482 AbstractCegarLoop]: Abstraction has 39995 states and 155735 transitions. [2021-06-05 06:53:37,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 39995 states and 155735 transitions. [2021-06-05 06:53:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:37,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:37,198 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:37,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4007 [2021-06-05 06:53:37,399 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-06-05 06:53:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:37,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627424712] [2021-06-05 06:53:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:37,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627424712] [2021-06-05 06:53:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627424712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833052694] [2021-06-05 06:53:37,433 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:37,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:37,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833052694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:37,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:37,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:53:37,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100823082] [2021-06-05 06:53:37,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:37,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:37,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:37,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:37,520 INFO L87 Difference]: Start difference. First operand 39995 states and 155735 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:39,216 INFO L93 Difference]: Finished difference Result 61857 states and 229366 transitions. [2021-06-05 06:53:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:53:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:39,390 INFO L225 Difference]: With dead ends: 61857 [2021-06-05 06:53:39,391 INFO L226 Difference]: Without dead ends: 61857 [2021-06-05 06:53:39,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 812.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 06:53:39,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61857 states. [2021-06-05 06:53:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61857 to 44335. [2021-06-05 06:53:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44335 states, 44334 states have (on average 3.8442053502954843) internal successors, (170429), 44334 states have internal predecessors, (170429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44335 states to 44335 states and 170429 transitions. [2021-06-05 06:53:41,033 INFO L78 Accepts]: Start accepts. Automaton has 44335 states and 170429 transitions. Word has length 28 [2021-06-05 06:53:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:41,034 INFO L482 AbstractCegarLoop]: Abstraction has 44335 states and 170429 transitions. [2021-06-05 06:53:41,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:41,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44335 states and 170429 transitions. [2021-06-05 06:53:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:41,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:41,124 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:41,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:41,325 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-06-05 06:53:41,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:41,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79079752] [2021-06-05 06:53:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:41,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:41,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79079752] [2021-06-05 06:53:41,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79079752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:41,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693286288] [2021-06-05 06:53:41,360 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:41,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:53:41,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:41,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693286288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:41,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:41,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:53:41,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390393657] [2021-06-05 06:53:41,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:41,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:41,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:41,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:41,443 INFO L87 Difference]: Start difference. First operand 44335 states and 170429 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:42,589 INFO L93 Difference]: Finished difference Result 61088 states and 227260 transitions. [2021-06-05 06:53:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:53:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:42,747 INFO L225 Difference]: With dead ends: 61088 [2021-06-05 06:53:42,747 INFO L226 Difference]: Without dead ends: 61080 [2021-06-05 06:53:42,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:53:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61080 states. [2021-06-05 06:53:44,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61080 to 43223. [2021-06-05 06:53:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43223 states, 43222 states have (on average 3.862963305723937) internal successors, (166965), 43222 states have internal predecessors, (166965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:44,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43223 states to 43223 states and 166965 transitions. [2021-06-05 06:53:44,361 INFO L78 Accepts]: Start accepts. Automaton has 43223 states and 166965 transitions. Word has length 28 [2021-06-05 06:53:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:44,361 INFO L482 AbstractCegarLoop]: Abstraction has 43223 states and 166965 transitions. [2021-06-05 06:53:44,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43223 states and 166965 transitions. [2021-06-05 06:53:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:44,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:44,434 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:44,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4009 [2021-06-05 06:53:44,635 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:44,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:44,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-06-05 06:53:44,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:44,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89992872] [2021-06-05 06:53:44,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:44,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:44,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89992872] [2021-06-05 06:53:44,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89992872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:44,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118309520] [2021-06-05 06:53:44,673 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:44,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:53:44,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:44,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:44,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118309520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:44,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:44,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:53:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169465936] [2021-06-05 06:53:44,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:44,764 INFO L87 Difference]: Start difference. First operand 43223 states and 166965 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:45,846 INFO L93 Difference]: Finished difference Result 59466 states and 222744 transitions. [2021-06-05 06:53:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:53:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:46,000 INFO L225 Difference]: With dead ends: 59466 [2021-06-05 06:53:46,000 INFO L226 Difference]: Without dead ends: 59442 [2021-06-05 06:53:46,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:53:46,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59442 states. [2021-06-05 06:53:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59442 to 43235. [2021-06-05 06:53:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43235 states, 43234 states have (on average 3.860827126798353) internal successors, (166919), 43234 states have internal predecessors, (166919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43235 states to 43235 states and 166919 transitions. [2021-06-05 06:53:47,603 INFO L78 Accepts]: Start accepts. Automaton has 43235 states and 166919 transitions. Word has length 28 [2021-06-05 06:53:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:47,603 INFO L482 AbstractCegarLoop]: Abstraction has 43235 states and 166919 transitions. [2021-06-05 06:53:47,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43235 states and 166919 transitions. [2021-06-05 06:53:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:47,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:47,669 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:47,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-05 06:53:47,869 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-06-05 06:53:47,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:47,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9790148] [2021-06-05 06:53:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:47,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:47,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9790148] [2021-06-05 06:53:47,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9790148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:47,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754869236] [2021-06-05 06:53:47,905 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:47,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:53:47,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:47,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754869236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:47,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:47,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:53:47,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084859263] [2021-06-05 06:53:47,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:53:47,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:53:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:53:47,986 INFO L87 Difference]: Start difference. First operand 43235 states and 166919 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:48,950 INFO L93 Difference]: Finished difference Result 60717 states and 226269 transitions. [2021-06-05 06:53:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:53:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:49,117 INFO L225 Difference]: With dead ends: 60717 [2021-06-05 06:53:49,117 INFO L226 Difference]: Without dead ends: 60677 [2021-06-05 06:53:49,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:53:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60677 states. [2021-06-05 06:53:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60677 to 43367. [2021-06-05 06:53:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43367 states, 43366 states have (on average 3.860143891527925) internal successors, (167399), 43366 states have internal predecessors, (167399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 167399 transitions. [2021-06-05 06:53:50,744 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 167399 transitions. Word has length 28 [2021-06-05 06:53:50,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:50,744 INFO L482 AbstractCegarLoop]: Abstraction has 43367 states and 167399 transitions. [2021-06-05 06:53:50,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:50,744 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 167399 transitions. [2021-06-05 06:53:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:50,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:50,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:51,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4011,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:51,020 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:51,020 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-06-05 06:53:51,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:51,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061883004] [2021-06-05 06:53:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:51,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061883004] [2021-06-05 06:53:51,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061883004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:51,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709683018] [2021-06-05 06:53:51,058 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:51,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:53:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:51,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709683018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:51,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:51,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:53:51,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195915952] [2021-06-05 06:53:51,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:51,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:51,181 INFO L87 Difference]: Start difference. First operand 43367 states and 167399 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:52,548 INFO L93 Difference]: Finished difference Result 59965 states and 224001 transitions. [2021-06-05 06:53:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 06:53:52,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:52,985 INFO L225 Difference]: With dead ends: 59965 [2021-06-05 06:53:52,985 INFO L226 Difference]: Without dead ends: 59965 [2021-06-05 06:53:52,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 06:53:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59965 states. [2021-06-05 06:53:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59965 to 44272. [2021-06-05 06:53:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44272 states, 44271 states have (on average 3.8506019742043325) internal successors, (170470), 44271 states have internal predecessors, (170470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44272 states to 44272 states and 170470 transitions. [2021-06-05 06:53:54,255 INFO L78 Accepts]: Start accepts. Automaton has 44272 states and 170470 transitions. Word has length 28 [2021-06-05 06:53:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:54,255 INFO L482 AbstractCegarLoop]: Abstraction has 44272 states and 170470 transitions. [2021-06-05 06:53:54,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 44272 states and 170470 transitions. [2021-06-05 06:53:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:54,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:54,324 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:54,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4012 [2021-06-05 06:53:54,525 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-06-05 06:53:54,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:54,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168144175] [2021-06-05 06:53:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:54,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168144175] [2021-06-05 06:53:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168144175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118965697] [2021-06-05 06:53:54,559 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:54,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:53:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:53:54,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:54,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118965697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:54,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:54,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:53:54,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843086391] [2021-06-05 06:53:54,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:53:54,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:53:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:53:54,669 INFO L87 Difference]: Start difference. First operand 44272 states and 170470 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:55,811 INFO L93 Difference]: Finished difference Result 59467 states and 222606 transitions. [2021-06-05 06:53:55,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:53:55,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:56,307 INFO L225 Difference]: With dead ends: 59467 [2021-06-05 06:53:56,308 INFO L226 Difference]: Without dead ends: 59459 [2021-06-05 06:53:56,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:53:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59459 states. [2021-06-05 06:53:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59459 to 44196. [2021-06-05 06:53:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44196 states, 44195 states have (on average 3.85188369725082) internal successors, (170234), 44195 states have internal predecessors, (170234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44196 states to 44196 states and 170234 transitions. [2021-06-05 06:53:57,628 INFO L78 Accepts]: Start accepts. Automaton has 44196 states and 170234 transitions. Word has length 28 [2021-06-05 06:53:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:53:57,628 INFO L482 AbstractCegarLoop]: Abstraction has 44196 states and 170234 transitions. [2021-06-05 06:53:57,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44196 states and 170234 transitions. [2021-06-05 06:53:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:53:57,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:53:57,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:53:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 06:53:57,904 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:53:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:53:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-06-05 06:53:57,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:53:57,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725147086] [2021-06-05 06:53:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:53:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:57,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:53:57,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725147086] [2021-06-05 06:53:57,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725147086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:57,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720938837] [2021-06-05 06:53:57,942 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:53:57,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:53:57,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:53:57,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:53:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:53:58,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720938837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:53:58,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:53:58,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:53:58,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097999221] [2021-06-05 06:53:58,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:53:58,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:53:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:53:58,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:53:58,048 INFO L87 Difference]: Start difference. First operand 44196 states and 170234 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:53:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:53:59,070 INFO L93 Difference]: Finished difference Result 58944 states and 221360 transitions. [2021-06-05 06:53:59,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:53:59,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:53:59,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:53:59,229 INFO L225 Difference]: With dead ends: 58944 [2021-06-05 06:53:59,229 INFO L226 Difference]: Without dead ends: 58920 [2021-06-05 06:53:59,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:53:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58920 states. [2021-06-05 06:54:00,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58920 to 44182. [2021-06-05 06:54:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44182 states, 44181 states have (on average 3.8518593965731878) internal successors, (170179), 44181 states have internal predecessors, (170179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44182 states to 44182 states and 170179 transitions. [2021-06-05 06:54:00,912 INFO L78 Accepts]: Start accepts. Automaton has 44182 states and 170179 transitions. Word has length 28 [2021-06-05 06:54:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:00,912 INFO L482 AbstractCegarLoop]: Abstraction has 44182 states and 170179 transitions. [2021-06-05 06:54:00,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 44182 states and 170179 transitions. [2021-06-05 06:54:00,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:00,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:00,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:01,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:01,177 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:01,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:01,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-06-05 06:54:01,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:01,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110908228] [2021-06-05 06:54:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:01,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110908228] [2021-06-05 06:54:01,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110908228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402288890] [2021-06-05 06:54:01,212 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:01,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:01,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402288890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:01,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:01,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:54:01,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659850589] [2021-06-05 06:54:01,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:54:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:54:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:54:01,300 INFO L87 Difference]: Start difference. First operand 44182 states and 170179 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:02,252 INFO L93 Difference]: Finished difference Result 58726 states and 220667 transitions. [2021-06-05 06:54:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:54:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:02,414 INFO L225 Difference]: With dead ends: 58726 [2021-06-05 06:54:02,414 INFO L226 Difference]: Without dead ends: 58686 [2021-06-05 06:54:02,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:54:02,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58686 states. [2021-06-05 06:54:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58686 to 44531. [2021-06-05 06:54:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44531 states, 44530 states have (on average 3.853761509094992) internal successors, (171608), 44530 states have internal predecessors, (171608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44531 states to 44531 states and 171608 transitions. [2021-06-05 06:54:04,132 INFO L78 Accepts]: Start accepts. Automaton has 44531 states and 171608 transitions. Word has length 28 [2021-06-05 06:54:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:04,133 INFO L482 AbstractCegarLoop]: Abstraction has 44531 states and 171608 transitions. [2021-06-05 06:54:04,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 44531 states and 171608 transitions. [2021-06-05 06:54:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:04,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:04,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:04,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4015,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:04,412 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-06-05 06:54:04,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:04,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469555356] [2021-06-05 06:54:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:04,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469555356] [2021-06-05 06:54:04,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469555356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:04,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819208619] [2021-06-05 06:54:04,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:04,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:54:04,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:04,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:04,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819208619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:04,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:04,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:54:04,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834200624] [2021-06-05 06:54:04,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:54:04,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:04,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:54:04,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:54:04,561 INFO L87 Difference]: Start difference. First operand 44531 states and 171608 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:05,698 INFO L93 Difference]: Finished difference Result 71242 states and 265120 transitions. [2021-06-05 06:54:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:54:05,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:05,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:05,881 INFO L225 Difference]: With dead ends: 71242 [2021-06-05 06:54:05,882 INFO L226 Difference]: Without dead ends: 71242 [2021-06-05 06:54:05,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:54:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71242 states. [2021-06-05 06:54:07,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71242 to 45697. [2021-06-05 06:54:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45697 states, 45696 states have (on average 3.8682379201680672) internal successors, (176763), 45696 states have internal predecessors, (176763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45697 states to 45697 states and 176763 transitions. [2021-06-05 06:54:07,658 INFO L78 Accepts]: Start accepts. Automaton has 45697 states and 176763 transitions. Word has length 28 [2021-06-05 06:54:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:07,658 INFO L482 AbstractCegarLoop]: Abstraction has 45697 states and 176763 transitions. [2021-06-05 06:54:07,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 45697 states and 176763 transitions. [2021-06-05 06:54:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:07,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:07,727 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:07,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4016,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:07,928 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-06-05 06:54:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:07,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89367758] [2021-06-05 06:54:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:07,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89367758] [2021-06-05 06:54:07,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89367758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:07,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321057656] [2021-06-05 06:54:07,962 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:07,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:08,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321057656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:08,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:08,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:54:08,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305050970] [2021-06-05 06:54:08,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:54:08,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:54:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:54:08,065 INFO L87 Difference]: Start difference. First operand 45697 states and 176763 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:09,100 INFO L93 Difference]: Finished difference Result 65327 states and 246370 transitions. [2021-06-05 06:54:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:54:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:09,271 INFO L225 Difference]: With dead ends: 65327 [2021-06-05 06:54:09,271 INFO L226 Difference]: Without dead ends: 65327 [2021-06-05 06:54:09,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 485.4ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:54:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65327 states. [2021-06-05 06:54:10,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65327 to 45727. [2021-06-05 06:54:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45727 states, 45726 states have (on average 3.868040064733412) internal successors, (176870), 45726 states have internal predecessors, (176870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45727 states to 45727 states and 176870 transitions. [2021-06-05 06:54:10,955 INFO L78 Accepts]: Start accepts. Automaton has 45727 states and 176870 transitions. Word has length 28 [2021-06-05 06:54:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:10,955 INFO L482 AbstractCegarLoop]: Abstraction has 45727 states and 176870 transitions. [2021-06-05 06:54:10,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 45727 states and 176870 transitions. [2021-06-05 06:54:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:11,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:11,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:11,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:11,223 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:11,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-06-05 06:54:11,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:11,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395439956] [2021-06-05 06:54:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:11,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395439956] [2021-06-05 06:54:11,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395439956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:11,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874593982] [2021-06-05 06:54:11,261 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:11,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:54:11,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:11,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874593982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:11,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:11,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:54:11,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165927230] [2021-06-05 06:54:11,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:54:11,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:11,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:54:11,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:54:11,382 INFO L87 Difference]: Start difference. First operand 45727 states and 176870 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:13,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:13,154 INFO L93 Difference]: Finished difference Result 66185 states and 248806 transitions. [2021-06-05 06:54:13,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 06:54:13,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:13,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:13,333 INFO L225 Difference]: With dead ends: 66185 [2021-06-05 06:54:13,333 INFO L226 Difference]: Without dead ends: 66185 [2021-06-05 06:54:13,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 826.7ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:54:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66185 states. [2021-06-05 06:54:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66185 to 45991. [2021-06-05 06:54:14,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45991 states, 45990 states have (on average 3.8644922809306372) internal successors, (177728), 45990 states have internal predecessors, (177728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:14,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45991 states to 45991 states and 177728 transitions. [2021-06-05 06:54:14,709 INFO L78 Accepts]: Start accepts. Automaton has 45991 states and 177728 transitions. Word has length 28 [2021-06-05 06:54:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:14,710 INFO L482 AbstractCegarLoop]: Abstraction has 45991 states and 177728 transitions. [2021-06-05 06:54:14,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 45991 states and 177728 transitions. [2021-06-05 06:54:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:14,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:14,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:14,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4018,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:14,981 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:14,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:14,981 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-06-05 06:54:14,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:14,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354555283] [2021-06-05 06:54:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:15,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:15,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354555283] [2021-06-05 06:54:15,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354555283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:15,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235325527] [2021-06-05 06:54:15,015 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:15,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:54:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:15,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:15,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235325527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:15,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:15,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:54:15,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884282683] [2021-06-05 06:54:15,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:54:15,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:15,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:54:15,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:54:15,123 INFO L87 Difference]: Start difference. First operand 45991 states and 177728 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:16,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:16,343 INFO L93 Difference]: Finished difference Result 65397 states and 246571 transitions. [2021-06-05 06:54:16,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:54:16,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:16,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:16,931 INFO L225 Difference]: With dead ends: 65397 [2021-06-05 06:54:16,931 INFO L226 Difference]: Without dead ends: 65393 [2021-06-05 06:54:16,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:54:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65393 states. [2021-06-05 06:54:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65393 to 45627. [2021-06-05 06:54:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45627 states, 45626 states have (on average 3.868233025029588) internal successors, (176492), 45626 states have internal predecessors, (176492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45627 states to 45627 states and 176492 transitions. [2021-06-05 06:54:18,382 INFO L78 Accepts]: Start accepts. Automaton has 45627 states and 176492 transitions. Word has length 28 [2021-06-05 06:54:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:18,383 INFO L482 AbstractCegarLoop]: Abstraction has 45627 states and 176492 transitions. [2021-06-05 06:54:18,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 45627 states and 176492 transitions. [2021-06-05 06:54:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:18,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:18,453 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:18,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4019,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:18,654 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:18,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-06-05 06:54:18,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:18,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495904294] [2021-06-05 06:54:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:18,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495904294] [2021-06-05 06:54:18,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495904294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877315898] [2021-06-05 06:54:18,692 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877315898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:18,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:18,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:54:18,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376265060] [2021-06-05 06:54:18,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:54:18,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:18,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:54:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:54:18,795 INFO L87 Difference]: Start difference. First operand 45627 states and 176492 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:19,652 INFO L93 Difference]: Finished difference Result 59724 states and 226961 transitions. [2021-06-05 06:54:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:54:19,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:19,817 INFO L225 Difference]: With dead ends: 59724 [2021-06-05 06:54:19,817 INFO L226 Difference]: Without dead ends: 59724 [2021-06-05 06:54:19,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:54:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59724 states. [2021-06-05 06:54:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59724 to 45643. [2021-06-05 06:54:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45643 states, 45642 states have (on average 3.8701196266596556) internal successors, (176640), 45642 states have internal predecessors, (176640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:21,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45643 states to 45643 states and 176640 transitions. [2021-06-05 06:54:21,699 INFO L78 Accepts]: Start accepts. Automaton has 45643 states and 176640 transitions. Word has length 28 [2021-06-05 06:54:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:21,700 INFO L482 AbstractCegarLoop]: Abstraction has 45643 states and 176640 transitions. [2021-06-05 06:54:21,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 45643 states and 176640 transitions. [2021-06-05 06:54:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:21,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:21,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:21,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 06:54:21,994 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:21,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:21,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-06-05 06:54:21,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:21,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426907649] [2021-06-05 06:54:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:22,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426907649] [2021-06-05 06:54:22,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426907649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:22,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638154542] [2021-06-05 06:54:22,030 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:22,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:22,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:22,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638154542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:22,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:22,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:54:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505291072] [2021-06-05 06:54:22,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:54:22,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:22,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:54:22,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:54:22,126 INFO L87 Difference]: Start difference. First operand 45643 states and 176640 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:22,831 INFO L93 Difference]: Finished difference Result 59038 states and 225086 transitions. [2021-06-05 06:54:22,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:54:22,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:22,986 INFO L225 Difference]: With dead ends: 59038 [2021-06-05 06:54:22,987 INFO L226 Difference]: Without dead ends: 59026 [2021-06-05 06:54:22,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:54:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59026 states. [2021-06-05 06:54:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59026 to 45577. [2021-06-05 06:54:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45577 states, 45576 states have (on average 3.8712699666491135) internal successors, (176437), 45576 states have internal predecessors, (176437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45577 states to 45577 states and 176437 transitions. [2021-06-05 06:54:24,295 INFO L78 Accepts]: Start accepts. Automaton has 45577 states and 176437 transitions. Word has length 28 [2021-06-05 06:54:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 45577 states and 176437 transitions. [2021-06-05 06:54:24,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 45577 states and 176437 transitions. [2021-06-05 06:54:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:24,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:24,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:24,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:24,569 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:24,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:24,569 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-06-05 06:54:24,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:24,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757555038] [2021-06-05 06:54:24,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:24,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:24,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757555038] [2021-06-05 06:54:24,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757555038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:24,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81436183] [2021-06-05 06:54:24,605 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:24,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:54:24,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:24,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81436183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:24,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:24,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:54:24,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117877296] [2021-06-05 06:54:24,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:54:24,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:24,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:54:24,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:54:24,709 INFO L87 Difference]: Start difference. First operand 45577 states and 176437 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:25,188 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-06-05 06:54:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:25,611 INFO L93 Difference]: Finished difference Result 50058 states and 191219 transitions. [2021-06-05 06:54:25,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:54:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:25,749 INFO L225 Difference]: With dead ends: 50058 [2021-06-05 06:54:25,749 INFO L226 Difference]: Without dead ends: 50058 [2021-06-05 06:54:25,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:54:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50058 states. [2021-06-05 06:54:26,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50058 to 45785. [2021-06-05 06:54:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45785 states, 45784 states have (on average 3.8687969596365543) internal successors, (177129), 45784 states have internal predecessors, (177129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45785 states to 45785 states and 177129 transitions. [2021-06-05 06:54:26,927 INFO L78 Accepts]: Start accepts. Automaton has 45785 states and 177129 transitions. Word has length 28 [2021-06-05 06:54:26,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:26,927 INFO L482 AbstractCegarLoop]: Abstraction has 45785 states and 177129 transitions. [2021-06-05 06:54:26,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:26,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45785 states and 177129 transitions. [2021-06-05 06:54:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:26,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:26,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:27,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 06:54:27,195 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:27,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:27,196 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-06-05 06:54:27,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:27,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465769752] [2021-06-05 06:54:27,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:27,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465769752] [2021-06-05 06:54:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465769752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389683508] [2021-06-05 06:54:27,233 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:27,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:27,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:27,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:27,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389683508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:27,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:27,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:54:27,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904565836] [2021-06-05 06:54:27,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:54:27,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:54:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:54:27,332 INFO L87 Difference]: Start difference. First operand 45785 states and 177129 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:27,853 INFO L93 Difference]: Finished difference Result 49905 states and 190821 transitions. [2021-06-05 06:54:27,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:27,985 INFO L225 Difference]: With dead ends: 49905 [2021-06-05 06:54:27,985 INFO L226 Difference]: Without dead ends: 49901 [2021-06-05 06:54:27,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:54:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49901 states. [2021-06-05 06:54:29,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49901 to 45725. [2021-06-05 06:54:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45725 states, 45724 states have (on average 3.869674569154055) internal successors, (176937), 45724 states have internal predecessors, (176937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45725 states to 45725 states and 176937 transitions. [2021-06-05 06:54:29,354 INFO L78 Accepts]: Start accepts. Automaton has 45725 states and 176937 transitions. Word has length 28 [2021-06-05 06:54:29,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:29,354 INFO L482 AbstractCegarLoop]: Abstraction has 45725 states and 176937 transitions. [2021-06-05 06:54:29,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:29,354 INFO L276 IsEmpty]: Start isEmpty. Operand 45725 states and 176937 transitions. [2021-06-05 06:54:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:29,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:29,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:29,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4023 [2021-06-05 06:54:29,623 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 80 times [2021-06-05 06:54:29,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:29,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438754371] [2021-06-05 06:54:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:29,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:29,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438754371] [2021-06-05 06:54:29,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438754371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:29,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597870444] [2021-06-05 06:54:29,657 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:29,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:29,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:30,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597870444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:30,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:30,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 06:54:30,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927958246] [2021-06-05 06:54:30,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:54:30,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:54:30,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:54:30,026 INFO L87 Difference]: Start difference. First operand 45725 states and 176937 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:30,663 INFO L93 Difference]: Finished difference Result 49960 states and 190934 transitions. [2021-06-05 06:54:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:54:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:30,792 INFO L225 Difference]: With dead ends: 49960 [2021-06-05 06:54:30,793 INFO L226 Difference]: Without dead ends: 49960 [2021-06-05 06:54:30,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:54:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49960 states. [2021-06-05 06:54:31,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49960 to 45829. [2021-06-05 06:54:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45829 states, 45828 states have (on average 3.86796281749149) internal successors, (177261), 45828 states have internal predecessors, (177261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45829 states to 45829 states and 177261 transitions. [2021-06-05 06:54:31,956 INFO L78 Accepts]: Start accepts. Automaton has 45829 states and 177261 transitions. Word has length 28 [2021-06-05 06:54:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:31,956 INFO L482 AbstractCegarLoop]: Abstraction has 45829 states and 177261 transitions. [2021-06-05 06:54:31,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 45829 states and 177261 transitions. [2021-06-05 06:54:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:32,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:32,024 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:32,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-06-05 06:54:32,224 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 81 times [2021-06-05 06:54:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:32,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717743070] [2021-06-05 06:54:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:54:32,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:32,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717743070] [2021-06-05 06:54:32,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717743070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:32,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634328537] [2021-06-05 06:54:32,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:32,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:54:32,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:54:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634328537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:32,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:32,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 06:54:32,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611432904] [2021-06-05 06:54:32,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:54:32,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:32,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:54:32,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:54:32,316 INFO L87 Difference]: Start difference. First operand 45829 states and 177261 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:32,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:32,742 INFO L93 Difference]: Finished difference Result 50055 states and 191371 transitions. [2021-06-05 06:54:32,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:32,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:32,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:32,875 INFO L225 Difference]: With dead ends: 50055 [2021-06-05 06:54:32,875 INFO L226 Difference]: Without dead ends: 50043 [2021-06-05 06:54:32,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:54:32,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50043 states. [2021-06-05 06:54:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50043 to 45961. [2021-06-05 06:54:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45961 states, 45960 states have (on average 3.866166231505657) internal successors, (177689), 45960 states have internal predecessors, (177689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45961 states to 45961 states and 177689 transitions. [2021-06-05 06:54:34,139 INFO L78 Accepts]: Start accepts. Automaton has 45961 states and 177689 transitions. Word has length 28 [2021-06-05 06:54:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:34,139 INFO L482 AbstractCegarLoop]: Abstraction has 45961 states and 177689 transitions. [2021-06-05 06:54:34,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:34,139 INFO L276 IsEmpty]: Start isEmpty. Operand 45961 states and 177689 transitions. [2021-06-05 06:54:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:34,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:34,209 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:34,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:34,409 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 82 times [2021-06-05 06:54:34,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:34,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136434812] [2021-06-05 06:54:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:34,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136434812] [2021-06-05 06:54:34,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136434812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:34,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595816332] [2021-06-05 06:54:34,444 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:34,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:34,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:34,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:54:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:34,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595816332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:34,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:34,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 06:54:34,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918994736] [2021-06-05 06:54:34,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:54:34,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:34,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:54:34,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:54:34,803 INFO L87 Difference]: Start difference. First operand 45961 states and 177689 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:35,262 INFO L93 Difference]: Finished difference Result 50019 states and 191287 transitions. [2021-06-05 06:54:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:54:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:35,395 INFO L225 Difference]: With dead ends: 50019 [2021-06-05 06:54:35,395 INFO L226 Difference]: Without dead ends: 49999 [2021-06-05 06:54:35,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:54:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49999 states. [2021-06-05 06:54:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49999 to 45961. [2021-06-05 06:54:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45961 states, 45960 states have (on average 3.8660791993037424) internal successors, (177685), 45960 states have internal predecessors, (177685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45961 states to 45961 states and 177685 transitions. [2021-06-05 06:54:36,735 INFO L78 Accepts]: Start accepts. Automaton has 45961 states and 177685 transitions. Word has length 28 [2021-06-05 06:54:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:36,735 INFO L482 AbstractCegarLoop]: Abstraction has 45961 states and 177685 transitions. [2021-06-05 06:54:36,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 45961 states and 177685 transitions. [2021-06-05 06:54:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:36,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:36,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:37,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:37,029 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-06-05 06:54:37,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:37,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370088579] [2021-06-05 06:54:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:37,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:37,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370088579] [2021-06-05 06:54:37,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370088579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:37,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695346025] [2021-06-05 06:54:37,062 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:37,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:54:37,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695346025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:54:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079987681] [2021-06-05 06:54:37,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:37,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:37,150 INFO L87 Difference]: Start difference. First operand 45961 states and 177685 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:37,608 INFO L93 Difference]: Finished difference Result 50922 states and 195250 transitions. [2021-06-05 06:54:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:54:37,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:37,743 INFO L225 Difference]: With dead ends: 50922 [2021-06-05 06:54:37,743 INFO L226 Difference]: Without dead ends: 50909 [2021-06-05 06:54:37,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50909 states. [2021-06-05 06:54:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50909 to 48694. [2021-06-05 06:54:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48694 states, 48693 states have (on average 3.8747458566939805) internal successors, (188673), 48693 states have internal predecessors, (188673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48694 states to 48694 states and 188673 transitions. [2021-06-05 06:54:39,026 INFO L78 Accepts]: Start accepts. Automaton has 48694 states and 188673 transitions. Word has length 28 [2021-06-05 06:54:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:39,026 INFO L482 AbstractCegarLoop]: Abstraction has 48694 states and 188673 transitions. [2021-06-05 06:54:39,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 48694 states and 188673 transitions. [2021-06-05 06:54:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:39,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:39,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:39,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:39,300 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-06-05 06:54:39,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:39,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419996457] [2021-06-05 06:54:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:39,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:39,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419996457] [2021-06-05 06:54:39,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419996457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:39,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974511076] [2021-06-05 06:54:39,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:39,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:54:39,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:39,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:39,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:39,708 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-06-05 06:54:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:39,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974511076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:39,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:39,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:54:39,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871548168] [2021-06-05 06:54:39,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:39,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:39,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:39,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:39,730 INFO L87 Difference]: Start difference. First operand 48694 states and 188673 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:40,204 INFO L93 Difference]: Finished difference Result 54270 states and 206696 transitions. [2021-06-05 06:54:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:54:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:40,345 INFO L225 Difference]: With dead ends: 54270 [2021-06-05 06:54:40,345 INFO L226 Difference]: Without dead ends: 54270 [2021-06-05 06:54:40,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:54:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54270 states. [2021-06-05 06:54:41,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54270 to 43234. [2021-06-05 06:54:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43234 states, 43233 states have (on average 3.86188790969861) internal successors, (166961), 43233 states have internal predecessors, (166961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43234 states to 43234 states and 166961 transitions. [2021-06-05 06:54:41,486 INFO L78 Accepts]: Start accepts. Automaton has 43234 states and 166961 transitions. Word has length 28 [2021-06-05 06:54:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:41,486 INFO L482 AbstractCegarLoop]: Abstraction has 43234 states and 166961 transitions. [2021-06-05 06:54:41,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:41,486 INFO L276 IsEmpty]: Start isEmpty. Operand 43234 states and 166961 transitions. [2021-06-05 06:54:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:41,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:41,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:41,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4028 [2021-06-05 06:54:41,757 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-06-05 06:54:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669505019] [2021-06-05 06:54:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:41,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669505019] [2021-06-05 06:54:41,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669505019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376906909] [2021-06-05 06:54:41,789 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:41,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:41,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:41,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376906909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:41,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:41,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:54:41,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913798440] [2021-06-05 06:54:41,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:41,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:41,870 INFO L87 Difference]: Start difference. First operand 43234 states and 166961 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:42,353 INFO L93 Difference]: Finished difference Result 48110 states and 183380 transitions. [2021-06-05 06:54:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:54:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:42,459 INFO L225 Difference]: With dead ends: 48110 [2021-06-05 06:54:42,459 INFO L226 Difference]: Without dead ends: 48110 [2021-06-05 06:54:42,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:54:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48110 states. [2021-06-05 06:54:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48110 to 44067. [2021-06-05 06:54:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44067 states, 44066 states have (on average 3.8605500839649616) internal successors, (170119), 44066 states have internal predecessors, (170119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44067 states to 44067 states and 170119 transitions. [2021-06-05 06:54:43,626 INFO L78 Accepts]: Start accepts. Automaton has 44067 states and 170119 transitions. Word has length 28 [2021-06-05 06:54:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:43,626 INFO L482 AbstractCegarLoop]: Abstraction has 44067 states and 170119 transitions. [2021-06-05 06:54:43,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 44067 states and 170119 transitions. [2021-06-05 06:54:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:43,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:43,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:43,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:43,892 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:43,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-06-05 06:54:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:43,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074090131] [2021-06-05 06:54:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:43,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:43,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074090131] [2021-06-05 06:54:43,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074090131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:43,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625574662] [2021-06-05 06:54:43,929 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:43,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:54:43,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:43,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:44,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625574662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:44,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:44,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 06:54:44,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938964784] [2021-06-05 06:54:44,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:54:44,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:54:44,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:54:44,002 INFO L87 Difference]: Start difference. First operand 44067 states and 170119 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:44,680 INFO L93 Difference]: Finished difference Result 45824 states and 175980 transitions. [2021-06-05 06:54:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:54:44,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:44,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:44,790 INFO L225 Difference]: With dead ends: 45824 [2021-06-05 06:54:44,790 INFO L226 Difference]: Without dead ends: 45824 [2021-06-05 06:54:44,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45824 states. [2021-06-05 06:54:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45824 to 44075. [2021-06-05 06:54:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44075 states, 44074 states have (on average 3.8603938830149294) internal successors, (170143), 44074 states have internal predecessors, (170143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44075 states to 44075 states and 170143 transitions. [2021-06-05 06:54:46,003 INFO L78 Accepts]: Start accepts. Automaton has 44075 states and 170143 transitions. Word has length 28 [2021-06-05 06:54:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:46,003 INFO L482 AbstractCegarLoop]: Abstraction has 44075 states and 170143 transitions. [2021-06-05 06:54:46,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 44075 states and 170143 transitions. [2021-06-05 06:54:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:54:46,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:46,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:46,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4030 [2021-06-05 06:54:46,271 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-06-05 06:54:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:46,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586775615] [2021-06-05 06:54:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:46,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:46,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:46,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586775615] [2021-06-05 06:54:46,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586775615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:46,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630734795] [2021-06-05 06:54:46,304 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:46,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:54:46,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 06:54:46,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:46,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:46,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630734795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:46,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:46,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:54:46,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710758984] [2021-06-05 06:54:46,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:54:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:54:46,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:54:46,385 INFO L87 Difference]: Start difference. First operand 44075 states and 170143 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:46,846 INFO L93 Difference]: Finished difference Result 45544 states and 175058 transitions. [2021-06-05 06:54:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:54:46,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:54:46,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:47,000 INFO L225 Difference]: With dead ends: 45544 [2021-06-05 06:54:47,000 INFO L226 Difference]: Without dead ends: 45544 [2021-06-05 06:54:47,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:54:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45544 states. [2021-06-05 06:54:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45544 to 43969. [2021-06-05 06:54:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43969 states, 43968 states have (on average 3.86005731441048) internal successors, (169719), 43968 states have internal predecessors, (169719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43969 states to 43969 states and 169719 transitions. [2021-06-05 06:54:48,126 INFO L78 Accepts]: Start accepts. Automaton has 43969 states and 169719 transitions. Word has length 28 [2021-06-05 06:54:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:48,126 INFO L482 AbstractCegarLoop]: Abstraction has 43969 states and 169719 transitions. [2021-06-05 06:54:48,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 43969 states and 169719 transitions. [2021-06-05 06:54:48,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:54:48,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:48,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:48,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4031,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:48,401 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-06-05 06:54:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:48,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818202915] [2021-06-05 06:54:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:48,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:54:48,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818202915] [2021-06-05 06:54:48,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818202915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:48,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054622471] [2021-06-05 06:54:48,938 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:54:48,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:54:48,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:54:48,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:54:48,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:54:49,275 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 06:54:49,471 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 06:54:50,199 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-06-05 06:54:50,400 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-05 06:54:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:50,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:50,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:50,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:50,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:54:50,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:50,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:50,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:50,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:50,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 06:54:50,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,110 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 112 [2021-06-05 06:54:51,110 INFO L628 ElimStorePlain]: treesize reduction 342, result has 42.4 percent of original size [2021-06-05 06:54:51,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:51,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:54:51,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:51,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:54:51,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:51,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:51,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:54:51,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:51,366 INFO L518 ElimStorePlain]: Eliminatee v_prenex_518 vanished before elimination [2021-06-05 06:54:51,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:51,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:54:51,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:54:51,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:51,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:54:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:54:51,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:54:51,504 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:54:51,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:54:51,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:54:51,557 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:668, output treesize:42 [2021-06-05 06:54:51,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:54:51,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054622471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:54:51,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:54:51,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:54:51,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131950958] [2021-06-05 06:54:51,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:54:51,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:54:51,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:54:51,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:54:51,597 INFO L87 Difference]: Start difference. First operand 43969 states and 169719 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:52,097 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-05 06:54:52,427 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-05 06:54:52,750 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:54:52,950 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 73 [2021-06-05 06:54:53,126 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-05 06:54:53,761 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 87 [2021-06-05 06:54:54,199 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2021-06-05 06:54:54,961 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 88 [2021-06-05 06:54:55,319 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 106 [2021-06-05 06:54:55,701 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 107 [2021-06-05 06:54:56,374 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 141 [2021-06-05 06:54:56,654 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-05 06:54:56,879 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 06:54:57,071 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-06-05 06:54:57,388 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2021-06-05 06:54:57,580 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-05 06:54:57,711 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 40 [2021-06-05 06:54:58,014 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2021-06-05 06:54:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:54:58,240 INFO L93 Difference]: Finished difference Result 53961 states and 204236 transitions. [2021-06-05 06:54:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:54:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:54:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:54:58,383 INFO L225 Difference]: With dead ends: 53961 [2021-06-05 06:54:58,383 INFO L226 Difference]: Without dead ends: 53886 [2021-06-05 06:54:58,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 7178.3ms TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:54:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53886 states. [2021-06-05 06:54:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53886 to 44104. [2021-06-05 06:54:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44104 states, 44103 states have (on average 3.8592386005487156) internal successors, (170204), 44103 states have internal predecessors, (170204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44104 states to 44104 states and 170204 transitions. [2021-06-05 06:54:59,441 INFO L78 Accepts]: Start accepts. Automaton has 44104 states and 170204 transitions. Word has length 30 [2021-06-05 06:54:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:54:59,441 INFO L482 AbstractCegarLoop]: Abstraction has 44104 states and 170204 transitions. [2021-06-05 06:54:59,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:54:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 44104 states and 170204 transitions. [2021-06-05 06:54:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:54:59,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:54:59,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:54:59,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-05 06:54:59,709 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:54:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:54:59,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-06-05 06:54:59,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:54:59,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889552611] [2021-06-05 06:54:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:54:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:54:59,992 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-06-05 06:55:00,172 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-05 06:55:00,335 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 06:55:00,600 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2021-06-05 06:55:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:00,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:00,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889552611] [2021-06-05 06:55:00,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889552611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:00,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422600052] [2021-06-05 06:55:00,725 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:00,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:55:00,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:00,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:55:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:01,073 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 06:55:01,270 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 06:55:01,582 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 06:55:01,799 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 06:55:02,528 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 117 [2021-06-05 06:55:02,706 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 06:55:02,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:02,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:02,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:55:02,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:02,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:02,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:55:02,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,139 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 111 [2021-06-05 06:55:03,139 INFO L628 ElimStorePlain]: treesize reduction 176, result has 59.1 percent of original size [2021-06-05 06:55:03,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:03,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:55:03,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:55:03,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:03,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:55:03,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:55:03,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:55:03,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:03,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:03,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:55:03,542 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:03,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:03,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:55:03,595 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 21 variables, input treesize:504, output treesize:40 [2021-06-05 06:55:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:03,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422600052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:03,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:03,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:55:03,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956106210] [2021-06-05 06:55:03,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:55:03,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:55:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:55:03,639 INFO L87 Difference]: Start difference. First operand 44104 states and 170204 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:03,983 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2021-06-05 06:55:04,305 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 06:55:04,685 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 06:55:04,995 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 71 [2021-06-05 06:55:05,170 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2021-06-05 06:55:05,896 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 104 [2021-06-05 06:55:06,591 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-06-05 06:55:06,759 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 57 [2021-06-05 06:55:06,967 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-05 06:55:07,642 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 111 [2021-06-05 06:55:08,110 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 109 [2021-06-05 06:55:08,246 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-06-05 06:55:08,654 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 110 [2021-06-05 06:55:08,863 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 56 [2021-06-05 06:55:09,165 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-05 06:55:09,914 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 143 [2021-06-05 06:55:10,313 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 40 [2021-06-05 06:55:10,701 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-05 06:55:10,851 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 38 [2021-06-05 06:55:11,173 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-05 06:55:11,519 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2021-06-05 06:55:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:11,777 INFO L93 Difference]: Finished difference Result 54018 states and 204458 transitions. [2021-06-05 06:55:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:55:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:55:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:11,938 INFO L225 Difference]: With dead ends: 54018 [2021-06-05 06:55:11,938 INFO L226 Difference]: Without dead ends: 53949 [2021-06-05 06:55:11,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 9056.7ms TimeCoverageRelationStatistics Valid=567, Invalid=2625, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:55:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53949 states. [2021-06-05 06:55:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53949 to 44115. [2021-06-05 06:55:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44115 states, 44114 states have (on average 3.8592510314185975) internal successors, (170247), 44114 states have internal predecessors, (170247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44115 states to 44115 states and 170247 transitions. [2021-06-05 06:55:13,320 INFO L78 Accepts]: Start accepts. Automaton has 44115 states and 170247 transitions. Word has length 30 [2021-06-05 06:55:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:13,321 INFO L482 AbstractCegarLoop]: Abstraction has 44115 states and 170247 transitions. [2021-06-05 06:55:13,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 44115 states and 170247 transitions. [2021-06-05 06:55:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:55:13,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:13,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:13,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-05 06:55:13,629 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-06-05 06:55:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:13,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827801546] [2021-06-05 06:55:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:14,170 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 06:55:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:14,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:14,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827801546] [2021-06-05 06:55:14,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827801546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:14,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431086432] [2021-06-05 06:55:14,419 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:14,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:55:14,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:55:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:55:14,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:14,894 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 06:55:15,161 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-06-05 06:55:15,492 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 06:55:15,795 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:55:16,059 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-05 06:55:16,796 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-05 06:55:17,507 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 200 [2021-06-05 06:55:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:17,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:17,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 06:55:17,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:17,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:17,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2021-06-05 06:55:17,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,410 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 162 [2021-06-05 06:55:18,411 INFO L628 ElimStorePlain]: treesize reduction 503, result has 40.0 percent of original size [2021-06-05 06:55:18,411 INFO L518 ElimStorePlain]: Eliminatee A vanished before elimination [2021-06-05 06:55:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:55:18,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 06:55:18,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:55:18,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,660 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-05 06:55:18,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:55:18,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:55:18,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:55:18,872 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:18,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:18,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:55:18,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:55:18,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:55:18,963 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:55:19,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:55:19,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 32 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:55:19,042 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 40 variables, input treesize:939, output treesize:40 [2021-06-05 06:55:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:19,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431086432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:19,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:55:19,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:55:19,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129317465] [2021-06-05 06:55:19,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:55:19,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:55:19,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:55:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:55:19,099 INFO L87 Difference]: Start difference. First operand 44115 states and 170247 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:19,744 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-05 06:55:20,035 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 88 [2021-06-05 06:55:20,288 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2021-06-05 06:55:20,859 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 109 [2021-06-05 06:55:21,012 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 06:55:21,474 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 76 [2021-06-05 06:55:21,816 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 93 [2021-06-05 06:55:22,028 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-06-05 06:55:22,753 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2021-06-05 06:55:24,473 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 230 DAG size of output: 158 [2021-06-05 06:55:24,650 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-05 06:55:24,965 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 92 [2021-06-05 06:55:25,154 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-06-05 06:55:25,538 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 96 [2021-06-05 06:55:26,514 WARN L205 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 120 [2021-06-05 06:55:27,157 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 117 [2021-06-05 06:55:27,942 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 113 [2021-06-05 06:55:28,276 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2021-06-05 06:55:29,278 WARN L205 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 118 [2021-06-05 06:55:31,406 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 240 DAG size of output: 153 [2021-06-05 06:55:33,493 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 253 DAG size of output: 166 [2021-06-05 06:55:34,426 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 115 [2021-06-05 06:55:36,459 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 250 DAG size of output: 167 [2021-06-05 06:55:37,369 WARN L205 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 111 [2021-06-05 06:55:39,426 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 233 DAG size of output: 162 [2021-06-05 06:55:41,533 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 246 DAG size of output: 164 [2021-06-05 06:55:41,972 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-05 06:55:42,475 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 141 [2021-06-05 06:55:45,594 WARN L205 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 243 DAG size of output: 157 [2021-06-05 06:55:48,597 WARN L205 SmtUtils]: Spent 2.59 s on a formula simplification. DAG size of input: 256 DAG size of output: 159 [2021-06-05 06:55:48,921 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2021-06-05 06:55:49,107 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 06:55:49,445 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 143 [2021-06-05 06:55:49,613 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 06:55:49,989 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 145 [2021-06-05 06:55:54,246 WARN L205 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 318 DAG size of output: 214 [2021-06-05 06:55:54,963 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 107 [2021-06-05 06:55:55,729 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 118 [2021-06-05 06:55:56,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:55:56,068 INFO L93 Difference]: Finished difference Result 55978 states and 209840 transitions. [2021-06-05 06:55:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:55:56,069 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:55:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:55:56,209 INFO L225 Difference]: With dead ends: 55978 [2021-06-05 06:55:56,210 INFO L226 Difference]: Without dead ends: 55895 [2021-06-05 06:55:56,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 36338.5ms TimeCoverageRelationStatistics Valid=678, Invalid=4434, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 06:55:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55895 states. [2021-06-05 06:55:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55895 to 44185. [2021-06-05 06:55:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44185 states, 44184 states have (on average 3.858387651638602) internal successors, (170479), 44184 states have internal predecessors, (170479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44185 states to 44185 states and 170479 transitions. [2021-06-05 06:55:57,221 INFO L78 Accepts]: Start accepts. Automaton has 44185 states and 170479 transitions. Word has length 30 [2021-06-05 06:55:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:55:57,221 INFO L482 AbstractCegarLoop]: Abstraction has 44185 states and 170479 transitions. [2021-06-05 06:55:57,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:55:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 44185 states and 170479 transitions. [2021-06-05 06:55:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:55:57,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:55:57,498 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:55:57,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:57,713 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:55:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:55:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-06-05 06:55:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:55:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376894500] [2021-06-05 06:55:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:55:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:57,964 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-05 06:55:58,108 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 06:55:58,244 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 06:55:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:55:58,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:55:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376894500] [2021-06-05 06:55:58,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376894500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:55:58,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165909922] [2021-06-05 06:55:58,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:55:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:55:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:55:58,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:55:58,729 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-06-05 06:55:58,934 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-05 06:55:59,234 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 06:55:59,673 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-05 06:55:59,876 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 130 [2021-06-05 06:56:00,556 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 103 [2021-06-05 06:56:00,656 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_638, v_prenex_629, v_prenex_640, v_prenex_631, v_prenex_642, v_prenex_633], 6=[v_prenex_636]} [2021-06-05 06:56:00,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:00,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-06-05 06:56:00,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,104 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 128 [2021-06-05 06:56:01,104 INFO L628 ElimStorePlain]: treesize reduction 181, result has 64.4 percent of original size [2021-06-05 06:56:01,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:56:01,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,242 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 06:56:01,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:01,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:56:01,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:01,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:56:01,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,446 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-05 06:56:01,446 INFO L628 ElimStorePlain]: treesize reduction 18, result has 93.1 percent of original size [2021-06-05 06:56:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:01,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:56:01,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:56:01,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-05 06:56:01,630 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:01,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:56:01,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:56:01,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:01,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:01,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-06-05 06:56:01,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:01,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:01,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:56:01,838 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 24 variables, input treesize:539, output treesize:43 [2021-06-05 06:56:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:01,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165909922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:01,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:01,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:56:01,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598818934] [2021-06-05 06:56:01,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:56:01,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:01,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:56:01,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:56:01,884 INFO L87 Difference]: Start difference. First operand 44185 states and 170479 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:02,558 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2021-06-05 06:56:03,185 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2021-06-05 06:56:03,509 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 53 [2021-06-05 06:56:03,696 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2021-06-05 06:56:03,873 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 47 [2021-06-05 06:56:04,058 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-05 06:56:04,603 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 100 [2021-06-05 06:56:05,078 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 72 [2021-06-05 06:56:05,316 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-06-05 06:56:05,457 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-06-05 06:56:06,116 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 89 [2021-06-05 06:56:06,386 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2021-06-05 06:56:06,781 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2021-06-05 06:56:06,934 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2021-06-05 06:56:07,401 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 115 [2021-06-05 06:56:07,691 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-05 06:56:08,470 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 122 [2021-06-05 06:56:10,088 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 209 DAG size of output: 125 [2021-06-05 06:56:10,954 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 133 [2021-06-05 06:56:11,183 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 41 [2021-06-05 06:56:11,425 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2021-06-05 06:56:11,714 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-06-05 06:56:12,087 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2021-06-05 06:56:12,260 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2021-06-05 06:56:12,482 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2021-06-05 06:56:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:12,756 INFO L93 Difference]: Finished difference Result 53681 states and 198300 transitions. [2021-06-05 06:56:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:56:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:56:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:12,895 INFO L225 Difference]: With dead ends: 53681 [2021-06-05 06:56:12,895 INFO L226 Difference]: Without dead ends: 53591 [2021-06-05 06:56:12,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 11556.9ms TimeCoverageRelationStatistics Valid=734, Invalid=3048, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:56:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53591 states. [2021-06-05 06:56:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53591 to 44200. [2021-06-05 06:56:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44200 states, 44199 states have (on average 3.8580058372361368) internal successors, (170520), 44199 states have internal predecessors, (170520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44200 states to 44200 states and 170520 transitions. [2021-06-05 06:56:13,929 INFO L78 Accepts]: Start accepts. Automaton has 44200 states and 170520 transitions. Word has length 30 [2021-06-05 06:56:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:56:13,929 INFO L482 AbstractCegarLoop]: Abstraction has 44200 states and 170520 transitions. [2021-06-05 06:56:13,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 44200 states and 170520 transitions. [2021-06-05 06:56:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:56:14,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:56:14,003 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:56:14,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4206 [2021-06-05 06:56:14,203 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:56:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:56:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-06-05 06:56:14,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:56:14,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822350191] [2021-06-05 06:56:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:56:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:56:14,482 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 49 [2021-06-05 06:56:14,615 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2021-06-05 06:56:14,905 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-06-05 06:56:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:15,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:56:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822350191] [2021-06-05 06:56:15,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822350191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893468716] [2021-06-05 06:56:15,069 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:56:15,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:56:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:56:15,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:56:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:56:15,461 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-06-05 06:56:15,674 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-05 06:56:16,286 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-06-05 06:56:17,872 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 376 DAG size of output: 360 [2021-06-05 06:56:18,452 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_690, v_prenex_691, v_prenex_681, v_prenex_692, v_prenex_682, v_prenex_683, v_prenex_695, v_prenex_684, v_prenex_696, v_prenex_697, v_prenex_687, v_prenex_689, v_prenex_701, v_prenex_702, A, v_prenex_703, v_prenex_706, v_prenex_707], 6=[v_prenex_685, v_prenex_698]} [2021-06-05 06:56:18,530 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 06:56:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-06-05 06:56:18,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:20,573 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 449 DAG size of output: 425 [2021-06-05 06:56:20,574 INFO L628 ElimStorePlain]: treesize reduction 416, result has 75.3 percent of original size [2021-06-05 06:56:20,664 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:56:20,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-05 06:56:20,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:22,304 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 422 DAG size of output: 417 [2021-06-05 06:56:22,305 INFO L628 ElimStorePlain]: treesize reduction 9, result has 99.3 percent of original size [2021-06-05 06:56:22,381 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:56:22,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 06:56:22,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:23,213 WARN L205 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 418 [2021-06-05 06:56:23,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:23,291 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:56:23,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:56:23,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,061 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 414 [2021-06-05 06:56:24,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:24,156 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:56:24,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-06-05 06:56:24,159 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:24,227 INFO L354 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2021-06-05 06:56:24,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 34 [2021-06-05 06:56:24,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:25,836 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 417 DAG size of output: 415 [2021-06-05 06:56:25,837 INFO L628 ElimStorePlain]: treesize reduction 11, result has 99.1 percent of original size [2021-06-05 06:56:25,924 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:56:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-06-05 06:56:25,930 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:27,574 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 419 DAG size of output: 418 [2021-06-05 06:56:27,575 INFO L628 ElimStorePlain]: treesize reduction 16, result has 98.7 percent of original size [2021-06-05 06:56:27,655 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:56:27,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 43 [2021-06-05 06:56:27,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:28,467 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 415 [2021-06-05 06:56:28,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:28,545 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:56:28,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-06-05 06:56:28,557 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:30,146 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 420 DAG size of output: 408 [2021-06-05 06:56:30,147 INFO L628 ElimStorePlain]: treesize reduction 36, result has 97.1 percent of original size [2021-06-05 06:56:30,230 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:56:30,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 55 [2021-06-05 06:56:30,248 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:31,772 WARN L205 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 404 DAG size of output: 399 [2021-06-05 06:56:31,773 INFO L628 ElimStorePlain]: treesize reduction 9, result has 99.2 percent of original size [2021-06-05 06:56:31,847 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:56:31,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 43 [2021-06-05 06:56:31,851 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:32,569 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2021-06-05 06:56:32,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:32,641 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 06:56:32,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 39 [2021-06-05 06:56:32,642 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,367 WARN L205 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2021-06-05 06:56:33,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:33,453 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-06-05 06:56:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 39 [2021-06-05 06:56:33,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:33,535 INFO L354 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2021-06-05 06:56:33,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 06:56:33,538 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:34,931 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 396 DAG size of output: 395 [2021-06-05 06:56:34,932 INFO L628 ElimStorePlain]: treesize reduction 47, result has 95.9 percent of original size [2021-06-05 06:56:35,025 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:56:35,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:56:35,039 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:35,118 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:56:35,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:56:35,126 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:36,472 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 404 DAG size of output: 389 [2021-06-05 06:56:36,473 INFO L628 ElimStorePlain]: treesize reduction 67, result has 94.0 percent of original size [2021-06-05 06:56:36,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:36,528 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 59 [2021-06-05 06:56:36,539 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:37,834 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 393 DAG size of output: 387 [2021-06-05 06:56:37,835 INFO L628 ElimStorePlain]: treesize reduction 25, result has 97.7 percent of original size [2021-06-05 06:56:37,903 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 06:56:37,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 06:56:37,907 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:38,529 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification that was a NOOP. DAG size: 384 [2021-06-05 06:56:38,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:38,603 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-06-05 06:56:38,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 06:56:38,616 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:39,874 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 387 DAG size of output: 377 [2021-06-05 06:56:39,875 INFO L628 ElimStorePlain]: treesize reduction 29, result has 97.2 percent of original size [2021-06-05 06:56:39,953 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:56:39,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 55 [2021-06-05 06:56:39,964 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,149 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 375 DAG size of output: 368 [2021-06-05 06:56:41,150 INFO L628 ElimStorePlain]: treesize reduction 16, result has 98.4 percent of original size [2021-06-05 06:56:41,228 INFO L354 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2021-06-05 06:56:41,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-06-05 06:56:41,237 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:41,268 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-05 06:56:41,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:56:41,269 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,364 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 372 DAG size of output: 361 [2021-06-05 06:56:42,365 INFO L628 ElimStorePlain]: treesize reduction 31, result has 96.8 percent of original size [2021-06-05 06:56:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:42,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 06:56:42,437 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:42,967 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2021-06-05 06:56:42,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:56:43,023 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-05 06:56:43,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 48 [2021-06-05 06:56:43,028 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 06:56:43,551 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 349 [2021-06-05 06:56:43,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:56:43,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 40 dim-0 vars, 20 dim-1 vars, End of recursive call: and 26 xjuncts. [2021-06-05 06:56:43,627 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 60 variables, input treesize:1689, output treesize:1117 [2021-06-05 06:56:43,951 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 42 [2021-06-05 06:56:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:56:44,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893468716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:56:44,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:56:44,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 06:56:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818776022] [2021-06-05 06:56:44,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:56:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:56:44,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:56:44,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:56:44,012 INFO L87 Difference]: Start difference. First operand 44200 states and 170520 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:56:44,561 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-06-05 06:56:44,904 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-06-05 06:56:45,481 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-05 06:56:45,786 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-06-05 06:56:46,004 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-06-05 06:56:46,227 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 53 [2021-06-05 06:56:46,694 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2021-06-05 06:56:46,938 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 55 [2021-06-05 06:56:47,240 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2021-06-05 06:56:48,212 WARN L205 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 142 [2021-06-05 06:56:48,975 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2021-06-05 06:56:49,222 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-05 06:56:50,365 WARN L205 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 132 [2021-06-05 06:56:50,779 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-05 06:56:51,002 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 48 [2021-06-05 06:56:51,942 WARN L205 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 138 [2021-06-05 06:56:53,478 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 177 DAG size of output: 145 [2021-06-05 06:56:55,878 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 420 DAG size of output: 397 [2021-06-05 06:56:56,118 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-05 06:56:57,421 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 419 DAG size of output: 211 [2021-06-05 06:56:57,710 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 35 [2021-06-05 06:56:57,933 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 42 [2021-06-05 06:56:58,182 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2021-06-05 06:56:58,424 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 43 [2021-06-05 06:56:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:56:58,829 INFO L93 Difference]: Finished difference Result 56880 states and 213210 transitions. [2021-06-05 06:56:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:56:58,829 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:56:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:56:58,975 INFO L225 Difference]: With dead ends: 56880 [2021-06-05 06:56:58,975 INFO L226 Difference]: Without dead ends: 56772 [2021-06-05 06:56:58,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 16126.1ms TimeCoverageRelationStatistics Valid=593, Invalid=3067, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:56:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56772 states. [2021-06-05 06:56:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56772 to 44239. [2021-06-05 06:56:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44239 states, 44238 states have (on average 3.857701523577015) internal successors, (170657), 44238 states have internal predecessors, (170657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44239 states to 44239 states and 170657 transitions. [2021-06-05 06:57:00,058 INFO L78 Accepts]: Start accepts. Automaton has 44239 states and 170657 transitions. Word has length 30 [2021-06-05 06:57:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:00,058 INFO L482 AbstractCegarLoop]: Abstraction has 44239 states and 170657 transitions. [2021-06-05 06:57:00,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 44239 states and 170657 transitions. [2021-06-05 06:57:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:57:00,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:00,131 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:00,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4235,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:00,332 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-06-05 06:57:00,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:00,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940917141] [2021-06-05 06:57:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:00,603 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-06-05 06:57:00,751 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-06-05 06:57:00,964 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-05 06:57:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:01,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:01,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940917141] [2021-06-05 06:57:01,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940917141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:01,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024198647] [2021-06-05 06:57:01,101 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:01,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:57:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:57:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:02,242 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 06:57:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:02,996 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 06:57:02,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 38 [2021-06-05 06:57:02,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,021 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:03,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,067 INFO L354 Elim1Store]: treesize reduction 24, result has 46.7 percent of original size [2021-06-05 06:57:03,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 42 [2021-06-05 06:57:03,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,115 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-05 06:57:03,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 38 [2021-06-05 06:57:03,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,144 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 06:57:03,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,171 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:57:03,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,197 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:03,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,226 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:03,226 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,267 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-06-05 06:57:03,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 37 [2021-06-05 06:57:03,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,318 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-06-05 06:57:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 43 [2021-06-05 06:57:03,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,363 INFO L354 Elim1Store]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 06:57:03,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 39 [2021-06-05 06:57:03,365 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,390 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:03,391 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,416 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:57:03,416 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,443 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:57:03,444 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,473 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:03,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,500 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:57:03,501 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,556 INFO L354 Elim1Store]: treesize reduction 14, result has 68.9 percent of original size [2021-06-05 06:57:03,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 55 [2021-06-05 06:57:03,564 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,594 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:03,595 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,626 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:03,626 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,657 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:03,658 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,687 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:03,687 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,717 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 1 [2021-06-05 06:57:03,718 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 69 [2021-06-05 06:57:03,776 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,808 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 25 [2021-06-05 06:57:03,810 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,841 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:03,841 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,873 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:03,874 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,905 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:03,906 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,951 INFO L354 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2021-06-05 06:57:03,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 34 [2021-06-05 06:57:03,953 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,983 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:03,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:57:03,984 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,012 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 06:57:04,014 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,047 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:04,047 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,078 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 06:57:04,080 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,114 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:04,114 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,150 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-05 06:57:04,150 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,182 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 06:57:04,182 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,212 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:04,213 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,241 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 22 [2021-06-05 06:57:04,241 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,271 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:04,272 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,303 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:57:04,304 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,330 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:57:04,331 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,360 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:04,361 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,390 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 1 [2021-06-05 06:57:04,391 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,423 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:04,423 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,451 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:57:04,452 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,481 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:57:04,482 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,508 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:57:04,509 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,539 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:57:04,539 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,566 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:57:04,567 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,593 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:04,593 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,619 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 25 [2021-06-05 06:57:04,620 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,653 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 1 [2021-06-05 06:57:04,653 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,683 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:04,684 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,713 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-05 06:57:04,714 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:04,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 60 [2021-06-05 06:57:04,765 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,794 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-05 06:57:04,794 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,820 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 25 [2021-06-05 06:57:04,821 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,846 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 25 [2021-06-05 06:57:04,847 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,874 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-05 06:57:04,874 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,901 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 22 [2021-06-05 06:57:04,902 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,927 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 25 [2021-06-05 06:57:04,928 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,953 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:57:04,954 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,977 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:04,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 06:57:04,977 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:04,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:04,999 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-05 06:57:05,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 1 [2021-06-05 06:57:05,000 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:05,023 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-05 06:57:05,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 29 [2021-06-05 06:57:05,025 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:05,300 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-06-05 06:57:05,301 INFO L628 ElimStorePlain]: treesize reduction 230, result has 39.6 percent of original size [2021-06-05 06:57:05,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:57:05,303 INFO L247 ElimStorePlain]: Needed 65 recursive calls to eliminate 2 variables, input treesize:3969, output treesize:177 [2021-06-05 06:57:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:05,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024198647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:05,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:05,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:57:05,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389256759] [2021-06-05 06:57:05,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:57:05,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:05,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:57:05,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:57:05,457 INFO L87 Difference]: Start difference. First operand 44239 states and 170657 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:06,150 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-06-05 06:57:06,829 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 06:57:07,071 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-06-05 06:57:07,411 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2021-06-05 06:57:07,612 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 06:57:07,863 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-05 06:57:08,056 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2021-06-05 06:57:08,216 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 06:57:08,827 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 97 [2021-06-05 06:57:09,205 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2021-06-05 06:57:09,448 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2021-06-05 06:57:09,803 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2021-06-05 06:57:10,089 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2021-06-05 06:57:10,237 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-05 06:57:10,501 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-05 06:57:10,756 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 83 [2021-06-05 06:57:10,993 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2021-06-05 06:57:11,357 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-05 06:57:11,757 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-06-05 06:57:12,077 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-05 06:57:12,235 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 06:57:12,454 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-05 06:57:12,621 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 06:57:12,891 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-05 06:57:13,417 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2021-06-05 06:57:13,582 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 06:57:13,968 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2021-06-05 06:57:14,264 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-06-05 06:57:14,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:14,700 INFO L93 Difference]: Finished difference Result 62789 states and 233965 transitions. [2021-06-05 06:57:14,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:57:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:57:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:14,859 INFO L225 Difference]: With dead ends: 62789 [2021-06-05 06:57:14,860 INFO L226 Difference]: Without dead ends: 62759 [2021-06-05 06:57:14,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 8913.9ms TimeCoverageRelationStatistics Valid=701, Invalid=4999, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:57:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62759 states. [2021-06-05 06:57:15,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62759 to 44280. [2021-06-05 06:57:15,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44280 states, 44279 states have (on average 3.8575622755708125) internal successors, (170809), 44279 states have internal predecessors, (170809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44280 states to 44280 states and 170809 transitions. [2021-06-05 06:57:15,988 INFO L78 Accepts]: Start accepts. Automaton has 44280 states and 170809 transitions. Word has length 30 [2021-06-05 06:57:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:15,988 INFO L482 AbstractCegarLoop]: Abstraction has 44280 states and 170809 transitions. [2021-06-05 06:57:15,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 44280 states and 170809 transitions. [2021-06-05 06:57:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:57:16,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:16,058 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:16,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4419,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:16,259 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 172 times [2021-06-05 06:57:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:16,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435808596] [2021-06-05 06:57:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:16,615 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 06:57:16,735 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 06:57:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:16,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:16,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435808596] [2021-06-05 06:57:16,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435808596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:16,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272804751] [2021-06-05 06:57:16,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:16,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:57:16,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:16,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:57:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:17,388 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 06:57:17,657 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:57:18,053 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 06:57:18,711 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 06:57:18,937 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 153 [2021-06-05 06:57:20,014 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 200 [2021-06-05 06:57:20,744 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 211 [2021-06-05 06:57:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 06:57:21,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-05 06:57:21,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:21,982 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 209 [2021-06-05 06:57:21,983 INFO L628 ElimStorePlain]: treesize reduction 669, result has 40.4 percent of original size [2021-06-05 06:57:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:21,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:21,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:57:22,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,189 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2021-06-05 06:57:22,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:22,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:57:22,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,377 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2021-06-05 06:57:22,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:57:22,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,546 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2021-06-05 06:57:22,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:22,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 06:57:22,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,700 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 06:57:22,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:57:22,713 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,847 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-05 06:57:22,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,848 INFO L518 ElimStorePlain]: Eliminatee v_prenex_762 vanished before elimination [2021-06-05 06:57:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:57:22,860 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:22,982 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-05 06:57:22,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:22,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:57:22,995 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:23,108 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-06-05 06:57:23,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:23,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:23,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:23,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:57:23,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:23,225 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-05 06:57:23,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:23,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 40 dim-0 vars, 10 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 06:57:23,232 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 50 variables, input treesize:1207, output treesize:52 [2021-06-05 06:57:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:23,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272804751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:23,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:23,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:57:23,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67206639] [2021-06-05 06:57:23,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:57:23,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:23,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:57:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:57:23,298 INFO L87 Difference]: Start difference. First operand 44280 states and 170809 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:23,527 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 32 [2021-06-05 06:57:24,498 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 87 [2021-06-05 06:57:25,064 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-05 06:57:25,910 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 169 [2021-06-05 06:57:26,747 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-05 06:57:26,903 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2021-06-05 06:57:27,350 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 117 [2021-06-05 06:57:27,620 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2021-06-05 06:57:28,096 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-06-05 06:57:28,277 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 06:57:29,633 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 215 DAG size of output: 171 [2021-06-05 06:57:29,898 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-05 06:57:30,787 WARN L205 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 170 [2021-06-05 06:57:31,739 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 175 [2021-06-05 06:57:32,593 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-06-05 06:57:33,089 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-05 06:57:33,282 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-06-05 06:57:33,787 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 140 [2021-06-05 06:57:35,155 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 217 DAG size of output: 173 [2021-06-05 06:57:36,576 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 224 DAG size of output: 177 [2021-06-05 06:57:37,593 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 144 [2021-06-05 06:57:38,359 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 150 [2021-06-05 06:57:39,553 WARN L205 SmtUtils]: Spent 866.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 157 [2021-06-05 06:57:42,099 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 354 DAG size of output: 184 [2021-06-05 06:57:42,340 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 06:57:44,041 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 282 DAG size of output: 256 [2021-06-05 06:57:45,158 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 164 [2021-06-05 06:57:48,029 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 361 DAG size of output: 190 [2021-06-05 06:57:48,595 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-05 06:57:50,220 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 289 DAG size of output: 262 [2021-06-05 06:57:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:57:50,991 INFO L93 Difference]: Finished difference Result 74020 states and 273031 transitions. [2021-06-05 06:57:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:57:50,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:57:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:57:51,170 INFO L225 Difference]: With dead ends: 74020 [2021-06-05 06:57:51,170 INFO L226 Difference]: Without dead ends: 73984 [2021-06-05 06:57:51,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2191 ImplicationChecksByTransitivity, 27603.9ms TimeCoverageRelationStatistics Valid=877, Invalid=6095, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:57:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73984 states. [2021-06-05 06:57:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73984 to 44408. [2021-06-05 06:57:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44408 states, 44407 states have (on average 3.856936969396717) internal successors, (171275), 44407 states have internal predecessors, (171275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44408 states to 44408 states and 171275 transitions. [2021-06-05 06:57:52,392 INFO L78 Accepts]: Start accepts. Automaton has 44408 states and 171275 transitions. Word has length 30 [2021-06-05 06:57:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:57:52,392 INFO L482 AbstractCegarLoop]: Abstraction has 44408 states and 171275 transitions. [2021-06-05 06:57:52,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:52,392 INFO L276 IsEmpty]: Start isEmpty. Operand 44408 states and 171275 transitions. [2021-06-05 06:57:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:57:52,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:57:52,463 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:57:52,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4857,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:52,664 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:57:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:57:52,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1460513255, now seen corresponding path program 173 times [2021-06-05 06:57:52,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:57:52,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113499552] [2021-06-05 06:57:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:57:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:57:53,144 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 06:57:53,345 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 06:57:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:53,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:57:53,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113499552] [2021-06-05 06:57:53,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113499552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:53,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985793528] [2021-06-05 06:57:53,520 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:57:53,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:57:53,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:57:53,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:57:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:57:54,275 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2021-06-05 06:57:54,899 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 06:57:54,985 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_782], 5=[A, v_prenex_790, v_prenex_780, v_prenex_784, v_prenex_786, v_prenex_788]} [2021-06-05 06:57:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:54,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-06-05 06:57:54,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,408 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 107 [2021-06-05 06:57:55,408 INFO L628 ElimStorePlain]: treesize reduction 326, result has 43.9 percent of original size [2021-06-05 06:57:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-06-05 06:57:55,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:57:55,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:57:55,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:55,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:57:55,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:55,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 06:57:55,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:57:55,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:57:55,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-06-05 06:57:55,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 06:57:55,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:57:55,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 7 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 06:57:55,836 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 14 variables, input treesize:602, output treesize:40 [2021-06-05 06:57:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:57:55,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985793528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:57:55,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:57:55,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 06:57:55,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260591697] [2021-06-05 06:57:55,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:57:55,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:57:55,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:57:55,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:57:55,885 INFO L87 Difference]: Start difference. First operand 44408 states and 171275 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:57:56,510 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2021-06-05 06:57:56,934 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-05 06:57:57,700 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 94 [2021-06-05 06:57:58,368 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-05 06:57:58,722 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-06-05 06:57:59,329 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 06:57:59,555 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-06-05 06:58:00,074 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 102 [2021-06-05 06:58:00,304 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-06-05 06:58:00,805 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2021-06-05 06:58:01,387 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2021-06-05 06:58:02,303 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-05 06:58:02,661 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-05 06:58:03,117 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-05 06:58:03,472 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-05 06:58:03,633 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 63 [2021-06-05 06:58:04,265 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2021-06-05 06:58:04,845 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 109 [2021-06-05 06:58:05,158 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 06:58:05,442 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2021-06-05 06:58:05,646 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-05 06:58:05,893 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2021-06-05 06:58:06,070 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 66 [2021-06-05 06:58:06,309 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 73 Received shutdown request... [2021-06-05 06:58:06,437 WARN L222 SmtUtils]: Removed 5 from assertion stack [2021-06-05 06:58:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 06:58:06,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4960,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:06,638 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:58:06,640 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:58:06,641 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:58:06,641 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:58:06 BasicIcfg [2021-06-05 06:58:06,641 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:58:06,642 INFO L168 Benchmark]: Toolchain (without parser) took 764694.56 ms. Allocated memory was 350.2 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 329.5 MB in the beginning and 12.0 GB in the end (delta: -11.6 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-06-05 06:58:06,642 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 350.2 MB. Free memory was 330.7 MB in the beginning and 330.6 MB in the end (delta: 85.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:58:06,642 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.96 ms. Allocated memory is still 350.2 MB. Free memory was 329.5 MB in the beginning and 328.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:58:06,642 INFO L168 Benchmark]: Boogie Preprocessor took 14.64 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 327.0 MB in the end (delta: 994.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:58:06,642 INFO L168 Benchmark]: RCFGBuilder took 273.47 ms. Allocated memory is still 350.2 MB. Free memory was 326.9 MB in the beginning and 314.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 06:58:06,642 INFO L168 Benchmark]: TraceAbstraction took 764366.13 ms. Allocated memory was 350.2 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 313.6 MB in the beginning and 12.0 GB in the end (delta: -11.7 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-06-05 06:58:06,642 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 0.17 ms. Allocated memory is still 350.2 MB. Free memory was 330.7 MB in the beginning and 330.6 MB in the end (delta: 85.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.96 ms. Allocated memory is still 350.2 MB. Free memory was 329.5 MB in the beginning and 328.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.64 ms. Allocated memory is still 350.2 MB. Free memory was 328.0 MB in the beginning and 327.0 MB in the end (delta: 994.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 273.47 ms. Allocated memory is still 350.2 MB. Free memory was 326.9 MB in the beginning and 314.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 764366.13 ms. Allocated memory was 350.2 MB in the beginning and 15.8 GB in the end (delta: 15.5 GB). Free memory was 313.6 MB in the beginning and 12.0 GB in the end (delta: -11.7 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44408states) and FLOYD_HOARE automaton (currently 69 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 79 for 81ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44408states) and FLOYD_HOARE automaton (currently 69 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 79 for 81ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (44408states) and FLOYD_HOARE automaton (currently 69 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 79 for 81ms.. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (44408states) and FLOYD_HOARE automaton (currently 69 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 79 for 81ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 764255.5ms, OverallIterations: 258, TraceHistogramMax: 3, EmptinessCheckTime: 5555.4ms, AutomataDifference: 412152.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11692 SDtfs, 73625 SDslu, 92558 SDs, 0 SdLazy, 148269 SolverSat, 13456 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 78764.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16910 GetRequests, 5448 SyntacticMatches, 240 SemanticMatches, 11221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194566 ImplicationChecksByTransitivity, 355554.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48694occurred in iteration=246, InterpolantAutomatonStates: 9915, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88771.1ms AutomataMinimizationTime, 257 MinimizatonAttempts, 1351182 StatesRemovedByMinimization, 257 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 716.3ms SsaConstructionTime, 2548.3ms SatisfiabilityAnalysisTime, 197207.8ms InterpolantComputationTime, 13738 NumberOfCodeBlocks, 13738 NumberOfCodeBlocksAsserted, 894 NumberOfCheckSat, 13225 ConstructedInterpolants, 202 QuantifiedInterpolants, 224824 SizeOfPredicates, 1017 NumberOfNonLiveVariables, 17355 ConjunctsInSsa, 3667 ConjunctsInUnsatCore, 513 InterpolantComputations, 3 PerfectInterpolantSequences, 1020/4424 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