/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-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:47:07,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:47:07,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:47:07,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 16:47:07,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:47:07,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:47:07,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:47:07,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:47:07,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:47:07,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:47:07,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:47:07,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:47:07,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:47:07,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:47:07,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:47:07,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:47:07,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:47:07,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 16:47:07,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:47:07,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:47:07,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:47:07,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:47:07,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:47:07,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:47:07,599 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:47:07,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:47:07,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:47:07,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:47:07,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:47:07,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:47:07,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:47:07,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:47:07,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:47:07,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:47:07,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:47:07,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:47:07,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:47:07,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:47:07,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:47:07,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:47:07,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:47:07,990 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:47:07,992 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:47:07,992 INFO L432 ainManager$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 [2021-05-03 16:47:07,993 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array.wvr.bpl' [2021-05-03 16:47:08,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:47:08,019 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:47:08,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:47:08,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:47:08,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:47:08,034 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 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,042 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 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:47:08,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:47:08,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:47:08,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:47:08,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... [2021-05-03 16:47:08,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:47:08,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:47:08,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:47:08,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:47:08,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:47:08,136 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:47:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:47:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:47:08,136 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:47:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:47:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:47:08,137 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:47:08,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:47:08,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:47:08,137 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:47:08,137 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:47:08,137 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:47:08,138 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:47:08,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:47:08,304 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:47:08,305 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:47:08 BoogieIcfgContainer [2021-05-03 16:47:08,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:47:08,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:47:08,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:47:08,310 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:47:08,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:47:08" (1/2) ... [2021-05-03 16:47:08,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a4054 and model type min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:47:08, skipping insertion in model container [2021-05-03 16:47:08,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:47:08" (2/2) ... [2021-05-03 16:47:08,313 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array.wvr.bpl [2021-05-03 16:47:08,317 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:47:08,318 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:47:08,321 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:47:08,322 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:47:08,361 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 16:47:08,394 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 16:47:08,430 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:47:08,430 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:47:08,430 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:47:08,431 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:47:08,431 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:47:08,431 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:47:08,431 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:47:08,431 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:47:08,440 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-05-03 16:47:08,460 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:08,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:08,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 16:47:08,470 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:08,471 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:08,471 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash -520695315, now seen corresponding path program 1 times [2021-05-03 16:47:08,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:08,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192204235] [2021-05-03 16:47:08,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:08,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192204235] [2021-05-03 16:47:08,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:47:08,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:47:08,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715997839] [2021-05-03 16:47:08,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:47:08,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:47:08,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:47:08,672 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:08,711 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-05-03 16:47:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:47:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 16:47:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:08,733 INFO L225 Difference]: With dead ends: 217 [2021-05-03 16:47:08,734 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 16:47:08,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:47:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 16:47:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-05-03 16:47:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-05-03 16:47:08,806 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-05-03 16:47:08,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:08,807 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-05-03 16:47:08,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:08,808 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-05-03 16:47:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:47:08,816 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:08,817 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:08,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:47:08,817 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:08,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:08,824 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-05-03 16:47:08,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:08,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283938753] [2021-05-03 16:47:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:08,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283938753] [2021-05-03 16:47:08,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:47:08,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:47:08,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293700474] [2021-05-03 16:47:08,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:47:08,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:47:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:47:08,927 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:08,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:08,990 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-05-03 16:47:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:47:08,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:47:08,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:08,995 INFO L225 Difference]: With dead ends: 158 [2021-05-03 16:47:08,996 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 16:47:08,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:47:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 16:47:09,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-05-03 16:47:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-05-03 16:47:09,011 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-05-03 16:47:09,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:09,012 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-05-03 16:47:09,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:09,012 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-05-03 16:47:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 16:47:09,014 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:09,015 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:09,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 16:47:09,015 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:09,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1197401099, now seen corresponding path program 1 times [2021-05-03 16:47:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:09,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498889421] [2021-05-03 16:47:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498889421] [2021-05-03 16:47:09,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:47:09,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:47:09,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748302484] [2021-05-03 16:47:09,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:47:09,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:09,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:47:09,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:47:09,097 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:09,154 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-05-03 16:47:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:47:09,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 16:47:09,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:09,160 INFO L225 Difference]: With dead ends: 183 [2021-05-03 16:47:09,161 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 16:47:09,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:47:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 16:47:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-05-03 16:47:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-05-03 16:47:09,173 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-05-03 16:47:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:09,174 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-05-03 16:47:09,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-05-03 16:47:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:47:09,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:09,176 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:09,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 16:47:09,177 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:09,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-05-03 16:47:09,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:09,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471463658] [2021-05-03 16:47:09,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:09,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471463658] [2021-05-03 16:47:09,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134396726] [2021-05-03 16:47:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:09,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:47:09,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:09,992 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 [2021-05-03 16:47:09,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:10,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:47:10,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:10,007 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 [2021-05-03 16:47:10,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:10,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:10,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:47:10,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:95, output treesize:17 [2021-05-03 16:47:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:10,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:10,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:10,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374884059] [2021-05-03 16:47:10,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:10,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:10,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:10,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:10,087 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:10,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:10,300 INFO L93 Difference]: Finished difference Result 298 states and 839 transitions. [2021-05-03 16:47:10,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:47:10,301 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:47:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:10,305 INFO L225 Difference]: With dead ends: 298 [2021-05-03 16:47:10,305 INFO L226 Difference]: Without dead ends: 283 [2021-05-03 16:47:10,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:47:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-03 16:47:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 224. [2021-05-03 16:47:10,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:10,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-05-03 16:47:10,334 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-05-03 16:47:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:10,334 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-05-03 16:47:10,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:10,335 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-05-03 16:47:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:47:10,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:10,336 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:10,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:10,537 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-05-03 16:47:10,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:10,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919533755] [2021-05-03 16:47:10,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919533755] [2021-05-03 16:47:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994230023] [2021-05-03 16:47:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:10,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:10,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:47:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:11,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 16:47:11,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:11,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:47:11,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,255 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:11,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:47:11,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:47:11,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:11,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:11,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:47:11,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:71 [2021-05-03 16:47:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:11,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:11,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 16:47:11,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246486047] [2021-05-03 16:47:11,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 16:47:11,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 16:47:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-03 16:47:11,454 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:11,974 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-05-03 16:47:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:47:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:47:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:11,977 INFO L225 Difference]: With dead ends: 374 [2021-05-03 16:47:11,977 INFO L226 Difference]: Without dead ends: 359 [2021-05-03 16:47:11,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:47:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-03 16:47:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-05-03 16:47:11,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-05-03 16:47:11,987 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-05-03 16:47:11,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:11,987 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-05-03 16:47:11,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:11,988 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-05-03 16:47:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:47:11,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:11,989 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:12,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:12,205 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-05-03 16:47:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:12,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692530001] [2021-05-03 16:47:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:12,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692530001] [2021-05-03 16:47:12,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440048579] [2021-05-03 16:47:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:12,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:47:12,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:12,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 16:47:12,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:47:12,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-03 16:47:12,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 16:47:12,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,614 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 [2021-05-03 16:47:12,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,618 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 [2021-05-03 16:47:12,620 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,622 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 [2021-05-03 16:47:12,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:12,641 INFO L628 ElimStorePlain]: treesize reduction 10, result has 63.0 percent of original size [2021-05-03 16:47:12,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:47:12,643 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:130, output treesize:17 [2021-05-03 16:47:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:12,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:12,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 16:47:12,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866183999] [2021-05-03 16:47:12,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:12,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:12,680 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:12,884 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-05-03 16:47:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:47:12,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:47:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:12,888 INFO L225 Difference]: With dead ends: 363 [2021-05-03 16:47:12,888 INFO L226 Difference]: Without dead ends: 348 [2021-05-03 16:47:12,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:47:12,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-03 16:47:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-05-03 16:47:12,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:12,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-05-03 16:47:12,896 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-05-03 16:47:12,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:12,897 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-05-03 16:47:12,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-05-03 16:47:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:47:12,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:12,898 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:13,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 16:47:13,119 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-05-03 16:47:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:13,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626294313] [2021-05-03 16:47:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:13,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626294313] [2021-05-03 16:47:13,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942058313] [2021-05-03 16:47:13,287 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:13,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:13,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:13,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:47:13,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:13,503 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:47:13,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:13,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:13,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 16:47:13,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:13,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:13,586 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-05-03 16:47:13,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:13,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:13,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:47:13,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:13,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:13,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:47:13,663 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:121, output treesize:71 [2021-05-03 16:47:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:13,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:13,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:13,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809024578] [2021-05-03 16:47:13,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:13,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:13,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:13,797 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:14,119 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-05-03 16:47:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 16:47:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:47:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:14,122 INFO L225 Difference]: With dead ends: 425 [2021-05-03 16:47:14,123 INFO L226 Difference]: Without dead ends: 410 [2021-05-03 16:47:14,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-03 16:47:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-05-03 16:47:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-05-03 16:47:14,134 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-05-03 16:47:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:14,134 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-05-03 16:47:14,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-05-03 16:47:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:14,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:14,136 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:14,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 16:47:14,360 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-05-03 16:47:14,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:14,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214695689] [2021-05-03 16:47:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:14,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214695689] [2021-05-03 16:47:14,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867338377] [2021-05-03 16:47:14,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:14,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:47:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:14,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:14,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:14,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:14,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330704265] [2021-05-03 16:47:14,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:14,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:14,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:14,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:14,556 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:15,007 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-05-03 16:47:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:47:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:15,012 INFO L225 Difference]: With dead ends: 619 [2021-05-03 16:47:15,012 INFO L226 Difference]: Without dead ends: 619 [2021-05-03 16:47:15,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:47:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-05-03 16:47:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-05-03 16:47:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-05-03 16:47:15,025 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-05-03 16:47:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:15,026 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-05-03 16:47:15,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-05-03 16:47:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:15,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:15,027 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:15,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 16:47:15,249 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:15,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:15,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-05-03 16:47:15,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:15,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132305670] [2021-05-03 16:47:15,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:15,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132305670] [2021-05-03 16:47:15,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807176895] [2021-05-03 16:47:15,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:15,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:15,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:15,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:15,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:15,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833986148] [2021-05-03 16:47:15,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:15,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:15,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:15,441 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:16,279 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-05-03 16:47:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:47:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:16,285 INFO L225 Difference]: With dead ends: 1078 [2021-05-03 16:47:16,285 INFO L226 Difference]: Without dead ends: 1078 [2021-05-03 16:47:16,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:47:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-05-03 16:47:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-05-03 16:47:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-05-03 16:47:16,305 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-05-03 16:47:16,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:16,305 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-05-03 16:47:16,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-05-03 16:47:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:16,307 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:16,307 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:16,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:16,521 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-05-03 16:47:16,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:16,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667322910] [2021-05-03 16:47:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:16,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667322910] [2021-05-03 16:47:16,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579855766] [2021-05-03 16:47:16,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:16,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:16,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:16,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:16,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762137] [2021-05-03 16:47:16,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:16,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:16,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:16,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:16,727 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:17,441 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-05-03 16:47:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:47:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:17,447 INFO L225 Difference]: With dead ends: 951 [2021-05-03 16:47:17,447 INFO L226 Difference]: Without dead ends: 951 [2021-05-03 16:47:17,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 475.6ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 16:47:17,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-03 16:47:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-05-03 16:47:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-05-03 16:47:17,463 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-05-03 16:47:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:17,463 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-05-03 16:47:17,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-05-03 16:47:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:17,464 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:17,464 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:17,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 16:47:17,681 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-05-03 16:47:17,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:17,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112804274] [2021-05-03 16:47:17,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112804274] [2021-05-03 16:47:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32680559] [2021-05-03 16:47:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:47:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:17,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:17,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:17,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:47:17,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413847426] [2021-05-03 16:47:17,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:47:17,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:17,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:47:17,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:47:17,814 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:17,963 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-05-03 16:47:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:47:17,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:17,967 INFO L225 Difference]: With dead ends: 669 [2021-05-03 16:47:17,967 INFO L226 Difference]: Without dead ends: 663 [2021-05-03 16:47:17,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-05-03 16:47:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-05-03 16:47:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-05-03 16:47:17,984 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-05-03 16:47:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:17,984 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-05-03 16:47:17,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-05-03 16:47:17,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:17,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:17,987 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:18,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 16:47:18,209 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-05-03 16:47:18,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:18,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877782118] [2021-05-03 16:47:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877782118] [2021-05-03 16:47:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413173147] [2021-05-03 16:47:18,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:18,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:18,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:18,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:47:18,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545029468] [2021-05-03 16:47:18,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:18,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:18,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:18,416 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:18,605 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-05-03 16:47:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:47:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:18,611 INFO L225 Difference]: With dead ends: 710 [2021-05-03 16:47:18,611 INFO L226 Difference]: Without dead ends: 672 [2021-05-03 16:47:18,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:47:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-03 16:47:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-05-03 16:47:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-05-03 16:47:18,638 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-05-03 16:47:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:18,638 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-05-03 16:47:18,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-05-03 16:47:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:18,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:18,641 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:18,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 16:47:18,857 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:18,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-05-03 16:47:18,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:18,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827325283] [2021-05-03 16:47:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:18,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827325283] [2021-05-03 16:47:18,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873987383] [2021-05-03 16:47:18,898 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) [2021-05-03 16:47:18,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:18,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:47:18,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:18,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:18,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:47:18,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040386639] [2021-05-03 16:47:18,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:47:18,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:18,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:47:18,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:47:18,994 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:19,110 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-05-03 16:47:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:47:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:19,115 INFO L225 Difference]: With dead ends: 830 [2021-05-03 16:47:19,115 INFO L226 Difference]: Without dead ends: 830 [2021-05-03 16:47:19,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-03 16:47:19,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-05-03 16:47:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-05-03 16:47:19,136 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-05-03 16:47:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:19,137 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-05-03 16:47:19,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-05-03 16:47:19,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:19,139 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:19,139 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:19,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:19,353 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-05-03 16:47:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:19,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35021752] [2021-05-03 16:47:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:19,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35021752] [2021-05-03 16:47:19,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617216146] [2021-05-03 16:47:19,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:19,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:47:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:19,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:19,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:19,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:19,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483142402] [2021-05-03 16:47:19,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:19,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:19,514 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:19,867 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-05-03 16:47:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:47:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:19,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:19,875 INFO L225 Difference]: With dead ends: 1196 [2021-05-03 16:47:19,875 INFO L226 Difference]: Without dead ends: 1196 [2021-05-03 16:47:19,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:47:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-05-03 16:47:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-05-03 16:47:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-05-03 16:47:19,900 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-05-03 16:47:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:19,900 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-05-03 16:47:19,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-05-03 16:47:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:19,902 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:19,902 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:20,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 16:47:20,125 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-05-03 16:47:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:20,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124578167] [2021-05-03 16:47:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:20,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124578167] [2021-05-03 16:47:20,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172334031] [2021-05-03 16:47:20,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:20,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:20,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:20,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:20,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:20,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825680360] [2021-05-03 16:47:20,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:20,300 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:20,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:20,812 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-05-03 16:47:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:47:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:20,821 INFO L225 Difference]: With dead ends: 1492 [2021-05-03 16:47:20,821 INFO L226 Difference]: Without dead ends: 1492 [2021-05-03 16:47:20,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:47:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-05-03 16:47:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-05-03 16:47:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-05-03 16:47:20,851 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-05-03 16:47:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:20,851 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-05-03 16:47:20,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-05-03 16:47:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:20,853 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:20,853 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:21,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:21,069 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-05-03 16:47:21,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:21,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632230877] [2021-05-03 16:47:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632230877] [2021-05-03 16:47:21,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342708391] [2021-05-03 16:47:21,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:21,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:21,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:21,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:47:21,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676848631] [2021-05-03 16:47:21,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:21,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:21,244 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:21,492 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-05-03 16:47:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:47:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:21,499 INFO L225 Difference]: With dead ends: 1258 [2021-05-03 16:47:21,499 INFO L226 Difference]: Without dead ends: 1248 [2021-05-03 16:47:21,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:47:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-03 16:47:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-05-03 16:47:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-05-03 16:47:21,524 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-05-03 16:47:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:21,525 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-05-03 16:47:21,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:21,525 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-05-03 16:47:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:21,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:21,528 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:21,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:47:21,753 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-05-03 16:47:21,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:21,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318442715] [2021-05-03 16:47:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:21,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318442715] [2021-05-03 16:47:21,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760714292] [2021-05-03 16:47:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:21,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:21,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:21,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:21,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-03 16:47:21,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765682421] [2021-05-03 16:47:21,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:21,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:21,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:21,896 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:22,153 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-05-03 16:47:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:47:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:22,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:22,160 INFO L225 Difference]: With dead ends: 1329 [2021-05-03 16:47:22,160 INFO L226 Difference]: Without dead ends: 1329 [2021-05-03 16:47:22,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:47:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-05-03 16:47:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-05-03 16:47:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-05-03 16:47:22,184 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-05-03 16:47:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:22,184 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-05-03 16:47:22,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-05-03 16:47:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:22,186 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:22,187 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:22,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:22,401 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-05-03 16:47:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:22,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162663568] [2021-05-03 16:47:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162663568] [2021-05-03 16:47:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174249626] [2021-05-03 16:47:22,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:22,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:22,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:22,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:22,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:22,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315194318] [2021-05-03 16:47:22,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:22,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:22,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:22,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:22,548 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:22,915 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-05-03 16:47:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:47:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:22,921 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 16:47:22,921 INFO L226 Difference]: Without dead ends: 1544 [2021-05-03 16:47:22,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:47:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-05-03 16:47:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-05-03 16:47:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-05-03 16:47:22,948 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-05-03 16:47:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:22,949 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-05-03 16:47:22,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-05-03 16:47:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:22,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:22,951 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:23,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 16:47:23,166 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:23,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-05-03 16:47:23,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:23,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423127235] [2021-05-03 16:47:23,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:23,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423127235] [2021-05-03 16:47:23,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031853777] [2021-05-03 16:47:23,210 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:23,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:23,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:23,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:23,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758327734] [2021-05-03 16:47:23,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:23,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:23,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:23,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:23,334 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:24,148 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-05-03 16:47:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:47:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:24,162 INFO L225 Difference]: With dead ends: 2734 [2021-05-03 16:47:24,162 INFO L226 Difference]: Without dead ends: 2734 [2021-05-03 16:47:24,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 495.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:47:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-05-03 16:47:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-05-03 16:47:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:24,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-05-03 16:47:24,204 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-05-03 16:47:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:24,204 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-05-03 16:47:24,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:24,205 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-05-03 16:47:24,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:24,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:24,208 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:24,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:24,431 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-05-03 16:47:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:24,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469123759] [2021-05-03 16:47:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:24,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469123759] [2021-05-03 16:47:24,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463959101] [2021-05-03 16:47:24,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:24,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:47:24,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:24,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:24,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:24,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:24,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66761140] [2021-05-03 16:47:24,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:24,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:24,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:24,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:24,627 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:25,441 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-05-03 16:47:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-03 16:47:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:25,451 INFO L225 Difference]: With dead ends: 2693 [2021-05-03 16:47:25,452 INFO L226 Difference]: Without dead ends: 2693 [2021-05-03 16:47:25,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 16:47:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-05-03 16:47:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-05-03 16:47:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-05-03 16:47:25,488 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-05-03 16:47:25,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:25,488 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-05-03 16:47:25,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-05-03 16:47:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:25,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:25,491 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:25,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 16:47:25,705 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:25,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-05-03 16:47:25,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:25,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330009700] [2021-05-03 16:47:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:25,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330009700] [2021-05-03 16:47:25,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586432967] [2021-05-03 16:47:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:25,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:25,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:25,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:25,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:25,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:25,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169940932] [2021-05-03 16:47:25,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:25,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:25,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:25,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:25,840 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:26,532 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-05-03 16:47:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 16:47:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:26,545 INFO L225 Difference]: With dead ends: 2677 [2021-05-03 16:47:26,545 INFO L226 Difference]: Without dead ends: 2677 [2021-05-03 16:47:26,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 16:47:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-05-03 16:47:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-05-03 16:47:26,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-05-03 16:47:26,582 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-05-03 16:47:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:26,582 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-05-03 16:47:26,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-05-03 16:47:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:26,587 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:26,587 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:26,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 16:47:26,809 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:26,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:26,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-05-03 16:47:26,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:26,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410978497] [2021-05-03 16:47:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:26,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410978497] [2021-05-03 16:47:26,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114618880] [2021-05-03 16:47:26,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:26,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:47:26,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:26,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:26,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:26,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:26,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:26,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468708434] [2021-05-03 16:47:26,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:26,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:26,991 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:27,543 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-05-03 16:47:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 16:47:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:27,549 INFO L225 Difference]: With dead ends: 2474 [2021-05-03 16:47:27,549 INFO L226 Difference]: Without dead ends: 2470 [2021-05-03 16:47:27,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:47:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-05-03 16:47:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-05-03 16:47:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-05-03 16:47:27,586 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-05-03 16:47:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:27,587 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-05-03 16:47:27,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-05-03 16:47:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:27,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:27,589 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 16:47:27,805 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-05-03 16:47:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401040530] [2021-05-03 16:47:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:27,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401040530] [2021-05-03 16:47:27,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226091947] [2021-05-03 16:47:27,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:27,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:47:27,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:27,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:27,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:27,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:27,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:27,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123438915] [2021-05-03 16:47:27,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:27,954 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:28,664 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-05-03 16:47:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:47:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:28,671 INFO L225 Difference]: With dead ends: 2514 [2021-05-03 16:47:28,671 INFO L226 Difference]: Without dead ends: 2514 [2021-05-03 16:47:28,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:47:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-05-03 16:47:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-05-03 16:47:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-05-03 16:47:28,707 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-05-03 16:47:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:28,707 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-05-03 16:47:28,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-05-03 16:47:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:28,709 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:28,709 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:28,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-03 16:47:28,921 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-05-03 16:47:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:28,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661101541] [2021-05-03 16:47:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:28,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661101541] [2021-05-03 16:47:28,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923004344] [2021-05-03 16:47:28,992 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) [2021-05-03 16:47:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:29,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:29,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:29,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:29,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:29,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439591996] [2021-05-03 16:47:29,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:29,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:29,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:29,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:29,132 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:29,801 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-05-03 16:47:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:47:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:29,807 INFO L225 Difference]: With dead ends: 2332 [2021-05-03 16:47:29,807 INFO L226 Difference]: Without dead ends: 2328 [2021-05-03 16:47:29,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:47:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-05-03 16:47:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-05-03 16:47:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:29,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-05-03 16:47:29,838 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-05-03 16:47:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:29,838 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-05-03 16:47:29,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:29,839 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-05-03 16:47:29,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:29,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:29,841 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:30,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:30,042 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:30,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:30,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-05-03 16:47:30,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:30,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403194078] [2021-05-03 16:47:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:30,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403194078] [2021-05-03 16:47:30,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30732522] [2021-05-03 16:47:30,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:30,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:47:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:47:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:30,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:30,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 16:47:30,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259699977] [2021-05-03 16:47:30,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:47:30,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:30,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:47:30,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:47:30,155 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:30,257 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-05-03 16:47:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 16:47:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:30,260 INFO L225 Difference]: With dead ends: 929 [2021-05-03 16:47:30,261 INFO L226 Difference]: Without dead ends: 929 [2021-05-03 16:47:30,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-05-03 16:47:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-05-03 16:47:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-05-03 16:47:30,291 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-05-03 16:47:30,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:30,291 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-05-03 16:47:30,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:30,292 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-05-03 16:47:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:30,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:30,294 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:30,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:30,517 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-05-03 16:47:30,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:30,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240336354] [2021-05-03 16:47:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:30,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240336354] [2021-05-03 16:47:30,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510694316] [2021-05-03 16:47:30,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:30,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:30,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:30,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:30,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:30,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:47:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704261793] [2021-05-03 16:47:30,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:47:30,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:47:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:47:30,687 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:31,015 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-05-03 16:47:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 16:47:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:31,020 INFO L225 Difference]: With dead ends: 1555 [2021-05-03 16:47:31,020 INFO L226 Difference]: Without dead ends: 1555 [2021-05-03 16:47:31,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:47:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-05-03 16:47:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-05-03 16:47:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-05-03 16:47:31,069 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-05-03 16:47:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:31,069 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-05-03 16:47:31,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-05-03 16:47:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:31,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:31,081 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:31,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 16:47:31,294 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:31,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-05-03 16:47:31,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:31,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671057301] [2021-05-03 16:47:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:31,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671057301] [2021-05-03 16:47:31,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812377915] [2021-05-03 16:47:31,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:31,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:47:31,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:31,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:31,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:47:31,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803510579] [2021-05-03 16:47:31,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:47:31,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:31,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:47:31,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:47:31,465 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:31,724 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-05-03 16:47:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:47:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:31,729 INFO L225 Difference]: With dead ends: 1605 [2021-05-03 16:47:31,729 INFO L226 Difference]: Without dead ends: 1605 [2021-05-03 16:47:31,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:47:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-05-03 16:47:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-05-03 16:47:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-05-03 16:47:31,755 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-05-03 16:47:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:31,755 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-05-03 16:47:31,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-05-03 16:47:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:31,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:31,758 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:31,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:31,973 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:31,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-05-03 16:47:31,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:31,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256459373] [2021-05-03 16:47:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:32,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256459373] [2021-05-03 16:47:32,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940929569] [2021-05-03 16:47:32,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:47:32,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:47:32,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:32,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 16:47:32,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340703999] [2021-05-03 16:47:32,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:47:32,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:47:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:47:32,095 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:32,277 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-05-03 16:47:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:47:32,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:32,280 INFO L225 Difference]: With dead ends: 1524 [2021-05-03 16:47:32,280 INFO L226 Difference]: Without dead ends: 1520 [2021-05-03 16:47:32,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:47:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-05-03 16:47:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-05-03 16:47:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-05-03 16:47:32,302 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-05-03 16:47:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:32,302 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-05-03 16:47:32,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-05-03 16:47:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:32,304 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:32,304 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:32,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-03 16:47:32,523 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:32,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-05-03 16:47:32,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:32,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892512774] [2021-05-03 16:47:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:32,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892512774] [2021-05-03 16:47:32,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53728477] [2021-05-03 16:47:32,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:32,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:47:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:32,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:32,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:32,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-03 16:47:32,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709611480] [2021-05-03 16:47:32,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 16:47:32,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 16:47:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:47:32,636 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:32,845 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-05-03 16:47:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:47:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:32,848 INFO L225 Difference]: With dead ends: 1508 [2021-05-03 16:47:32,848 INFO L226 Difference]: Without dead ends: 1496 [2021-05-03 16:47:32,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:47:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-05-03 16:47:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-05-03 16:47:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-05-03 16:47:32,863 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-05-03 16:47:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:32,863 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-05-03 16:47:32,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-05-03 16:47:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:32,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:32,866 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:33,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 16:47:33,072 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:33,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-05-03 16:47:33,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:33,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176735258] [2021-05-03 16:47:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:33,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176735258] [2021-05-03 16:47:33,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555920685] [2021-05-03 16:47:33,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:33,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:33,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:33,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:33,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875204216] [2021-05-03 16:47:33,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:33,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:33,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:33,220 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:33,730 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-05-03 16:47:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:47:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:33,736 INFO L225 Difference]: With dead ends: 2412 [2021-05-03 16:47:33,736 INFO L226 Difference]: Without dead ends: 2412 [2021-05-03 16:47:33,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:47:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-05-03 16:47:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-05-03 16:47:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-05-03 16:47:33,765 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-05-03 16:47:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:33,765 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-05-03 16:47:33,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-05-03 16:47:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:33,768 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:33,768 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:33,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 16:47:33,990 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-05-03 16:47:33,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:33,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342380851] [2021-05-03 16:47:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342380851] [2021-05-03 16:47:34,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470956357] [2021-05-03 16:47:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:34,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:34,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:34,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570054177] [2021-05-03 16:47:34,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:34,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:34,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:34,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:34,200 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:34,755 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-05-03 16:47:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:47:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:34,760 INFO L225 Difference]: With dead ends: 2335 [2021-05-03 16:47:34,760 INFO L226 Difference]: Without dead ends: 2335 [2021-05-03 16:47:34,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:47:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-05-03 16:47:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-05-03 16:47:34,786 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) [2021-05-03 16:47:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:47:34,789 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:47:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:34,789 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:47:34,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:47:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:34,792 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:34,792 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:35,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 16:47:35,014 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-05-03 16:47:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:35,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084436687] [2021-05-03 16:47:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:35,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084436687] [2021-05-03 16:47:35,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593700576] [2021-05-03 16:47:35,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:35,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:35,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:35,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:35,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:35,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:35,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519627154] [2021-05-03 16:47:35,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:35,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:35,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:35,154 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:35,575 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-05-03 16:47:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 16:47:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:35,581 INFO L225 Difference]: With dead ends: 2285 [2021-05-03 16:47:35,581 INFO L226 Difference]: Without dead ends: 2285 [2021-05-03 16:47:35,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 264.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:47:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-05-03 16:47:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-05-03 16:47:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:47:35,603 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:47:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:35,603 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:47:35,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:47:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:35,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:35,605 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:35,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 16:47:35,805 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-05-03 16:47:35,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:35,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523024475] [2021-05-03 16:47:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:35,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523024475] [2021-05-03 16:47:35,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2981350] [2021-05-03 16:47:35,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:35,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:47:35,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:35,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:35,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:35,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:35,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:35,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952382497] [2021-05-03 16:47:35,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:35,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:35,981 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:36,339 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-05-03 16:47:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 16:47:36,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:36,343 INFO L225 Difference]: With dead ends: 2176 [2021-05-03 16:47:36,343 INFO L226 Difference]: Without dead ends: 2172 [2021-05-03 16:47:36,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:47:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-05-03 16:47:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-05-03 16:47:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:47:36,363 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:47:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:36,363 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:47:36,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:47:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:36,365 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:36,366 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:36,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:36,566 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:36,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:36,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-05-03 16:47:36,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:36,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322140590] [2021-05-03 16:47:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:36,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322140590] [2021-05-03 16:47:36,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079653612] [2021-05-03 16:47:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:36,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:36,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:36,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:36,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:36,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:36,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468661821] [2021-05-03 16:47:36,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:36,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:36,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:36,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:36,765 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:37,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:37,224 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-05-03 16:47:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:47:37,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:37,229 INFO L225 Difference]: With dead ends: 2199 [2021-05-03 16:47:37,229 INFO L226 Difference]: Without dead ends: 2199 [2021-05-03 16:47:37,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:47:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-05-03 16:47:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-05-03 16:47:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-05-03 16:47:37,250 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-05-03 16:47:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:37,250 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-05-03 16:47:37,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-05-03 16:47:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:37,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:37,253 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:37,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:37,454 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:37,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:37,454 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-05-03 16:47:37,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:37,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166636306] [2021-05-03 16:47:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:37,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166636306] [2021-05-03 16:47:37,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511589139] [2021-05-03 16:47:37,497 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:37,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:47:37,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:37,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:37,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:37,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138094538] [2021-05-03 16:47:37,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:37,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:37,611 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:37,992 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-05-03 16:47:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:47:37,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:37,998 INFO L225 Difference]: With dead ends: 2156 [2021-05-03 16:47:37,998 INFO L226 Difference]: Without dead ends: 2152 [2021-05-03 16:47:37,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:47:38,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-05-03 16:47:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-05-03 16:47:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:38,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-05-03 16:47:38,028 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-05-03 16:47:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:38,028 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-05-03 16:47:38,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-05-03 16:47:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:38,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:38,031 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:38,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-03 16:47:38,245 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-05-03 16:47:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:38,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047249232] [2021-05-03 16:47:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047249232] [2021-05-03 16:47:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284133852] [2021-05-03 16:47:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:38,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:38,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:38,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:38,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:38,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733418139] [2021-05-03 16:47:38,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:38,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:38,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:38,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:38,375 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:38,727 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-05-03 16:47:38,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:47:38,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:38,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:38,731 INFO L225 Difference]: With dead ends: 2097 [2021-05-03 16:47:38,731 INFO L226 Difference]: Without dead ends: 2097 [2021-05-03 16:47:38,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:47:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-05-03 16:47:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-05-03 16:47:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-05-03 16:47:38,753 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-05-03 16:47:38,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:38,753 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-05-03 16:47:38,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-05-03 16:47:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:38,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:38,755 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:38,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:38,956 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-05-03 16:47:38,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:38,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116247230] [2021-05-03 16:47:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:38,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116247230] [2021-05-03 16:47:38,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967018706] [2021-05-03 16:47:38,996 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) [2021-05-03 16:47:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:39,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:39,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:39,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:39,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110899801] [2021-05-03 16:47:39,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:39,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:39,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:39,111 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:39,385 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-05-03 16:47:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:47:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:39,389 INFO L225 Difference]: With dead ends: 1963 [2021-05-03 16:47:39,389 INFO L226 Difference]: Without dead ends: 1959 [2021-05-03 16:47:39,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:47:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-05-03 16:47:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-05-03 16:47:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-05-03 16:47:39,416 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-05-03 16:47:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:39,416 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-05-03 16:47:39,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-05-03 16:47:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:39,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:39,419 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:39,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-03 16:47:39,633 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-05-03 16:47:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:39,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073182866] [2021-05-03 16:47:39,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073182866] [2021-05-03 16:47:39,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966912415] [2021-05-03 16:47:39,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:39,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:47:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:39,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:39,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:39,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 16:47:39,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043143683] [2021-05-03 16:47:39,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:47:39,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:47:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:47:39,754 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:39,963 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-05-03 16:47:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:47:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:39,966 INFO L225 Difference]: With dead ends: 1728 [2021-05-03 16:47:39,966 INFO L226 Difference]: Without dead ends: 1716 [2021-05-03 16:47:39,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:47:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-05-03 16:47:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-05-03 16:47:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-05-03 16:47:39,984 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-05-03 16:47:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:39,984 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-05-03 16:47:39,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-05-03 16:47:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:39,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:39,986 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:40,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:40,201 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-05-03 16:47:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:40,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811186798] [2021-05-03 16:47:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811186798] [2021-05-03 16:47:40,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249987159] [2021-05-03 16:47:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:40,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:47:40,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:40,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:40,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:40,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996314514] [2021-05-03 16:47:40,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:40,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:40,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:40,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:40,359 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:40,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:40,708 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-05-03 16:47:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:47:40,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:40,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:40,711 INFO L225 Difference]: With dead ends: 1821 [2021-05-03 16:47:40,711 INFO L226 Difference]: Without dead ends: 1821 [2021-05-03 16:47:40,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:47:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-05-03 16:47:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-05-03 16:47:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-05-03 16:47:40,736 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-05-03 16:47:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:40,736 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-05-03 16:47:40,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:40,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-05-03 16:47:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:40,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:40,739 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:40,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 16:47:40,961 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-05-03 16:47:40,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:40,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344857468] [2021-05-03 16:47:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:40,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344857468] [2021-05-03 16:47:40,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622621275] [2021-05-03 16:47:40,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:41,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:41,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:41,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:41,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:41,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 16:47:41,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169897255] [2021-05-03 16:47:41,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 16:47:41,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 16:47:41,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 16:47:41,117 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:41,415 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-05-03 16:47:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:47:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:41,418 INFO L225 Difference]: With dead ends: 1790 [2021-05-03 16:47:41,418 INFO L226 Difference]: Without dead ends: 1786 [2021-05-03 16:47:41,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:47:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-05-03 16:47:41,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-05-03 16:47:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-05-03 16:47:41,452 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-05-03 16:47:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:41,452 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-05-03 16:47:41,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-05-03 16:47:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:47:41,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:41,455 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:41,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 16:47:41,678 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-05-03 16:47:41,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:41,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912545510] [2021-05-03 16:47:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:41,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912545510] [2021-05-03 16:47:41,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502102932] [2021-05-03 16:47:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:41,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:47:41,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:41,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 16:47:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:41,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:41,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 16:47:41,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291670841] [2021-05-03 16:47:41,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:47:41,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:41,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:47:41,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:47:41,814 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:41,983 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-05-03 16:47:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:47:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:47:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:41,986 INFO L225 Difference]: With dead ends: 1649 [2021-05-03 16:47:41,986 INFO L226 Difference]: Without dead ends: 1637 [2021-05-03 16:47:41,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:47:41,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-05-03 16:47:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-05-03 16:47:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-05-03 16:47:42,003 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-05-03 16:47:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:42,003 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-05-03 16:47:42,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-05-03 16:47:42,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:42,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:42,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:42,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 16:47:42,207 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:42,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-05-03 16:47:42,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:42,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409711614] [2021-05-03 16:47:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409711614] [2021-05-03 16:47:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511968347] [2021-05-03 16:47:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:42,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:47:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:47:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:43,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:47:43,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:47:43,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:47:43,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:47:43,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:47:43,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:47:43,281 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:47:43,288 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,295 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 26 treesize of output 13 [2021-05-03 16:47:43,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:47:43,305 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:43,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:47:43,327 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:47:43,334 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:47:43,343 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:47:43,349 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:43,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:43,354 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:43,378 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:47:43,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:47:43,380 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:47:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:43,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:43,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:47:43,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801053367] [2021-05-03 16:47:43,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:43,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:43,410 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:44,214 INFO L93 Difference]: Finished difference Result 1531 states and 5001 transitions. [2021-05-03 16:47:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:47:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:47:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:44,217 INFO L225 Difference]: With dead ends: 1531 [2021-05-03 16:47:44,217 INFO L226 Difference]: Without dead ends: 1516 [2021-05-03 16:47:44,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-05-03 16:47:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-05-03 16:47:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1141. [2021-05-03 16:47:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-05-03 16:47:44,233 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-05-03 16:47:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:44,233 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-05-03 16:47:44,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-05-03 16:47:44,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:44,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:44,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:44,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 16:47:44,439 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:44,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:44,439 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-05-03 16:47:44,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:44,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758885824] [2021-05-03 16:47:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:44,695 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-05-03 16:47:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758885824] [2021-05-03 16:47:44,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489065621] [2021-05-03 16:47:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:44,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:47:44,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:47:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:45,402 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-05-03 16:47:45,461 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_3, v_prenex_5]} [2021-05-03 16:47:45,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:47:45,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:45,596 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:47:45,597 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:47:45,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:45,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:45,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:47:45,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:45,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:45,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:45,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:45,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:45,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:45,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:45,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:47:45,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:45,718 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-05-03 16:47:45,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:47:45,721 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-05-03 16:47:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:45,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:45,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:47:45,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677545944] [2021-05-03 16:47:45,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:45,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:45,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:45,774 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:46,605 INFO L93 Difference]: Finished difference Result 1548 states and 5036 transitions. [2021-05-03 16:47:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:47:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:47:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:46,608 INFO L225 Difference]: With dead ends: 1548 [2021-05-03 16:47:46,608 INFO L226 Difference]: Without dead ends: 1518 [2021-05-03 16:47:46,609 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:47:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-05-03 16:47:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1168. [2021-05-03 16:47:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 3.348757497857755) internal successors, (3908), 1167 states have internal predecessors, (3908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3908 transitions. [2021-05-03 16:47:46,625 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3908 transitions. Word has length 26 [2021-05-03 16:47:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:46,625 INFO L480 AbstractCegarLoop]: Abstraction has 1168 states and 3908 transitions. [2021-05-03 16:47:46,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3908 transitions. [2021-05-03 16:47:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:46,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:46,628 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:46,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:46,829 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-05-03 16:47:46,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:46,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006818644] [2021-05-03 16:47:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:47,223 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-03 16:47:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:47,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006818644] [2021-05-03 16:47:47,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416005685] [2021-05-03 16:47:47,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:47,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:47,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:47,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:47:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:48,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:48,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:47:48,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:47:48,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:47:48,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,249 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 35 treesize of output 19 [2021-05-03 16:47:48,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:47:48,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,278 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 41 treesize of output 16 [2021-05-03 16:47:48,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,291 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:47:48,292 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:47:48,305 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:47:48,316 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:47:48,328 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,342 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 37 treesize of output 19 [2021-05-03 16:47:48,343 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:48,355 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:47:48,365 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:48,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:48,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:47:48,372 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:48,396 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:47:48,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:47:48,398 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:47:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:48,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:48,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:47:48,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35856084] [2021-05-03 16:47:48,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:48,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:48,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:48,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:48,427 INFO L87 Difference]: Start difference. First operand 1168 states and 3908 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:48,965 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 44 [2021-05-03 16:47:49,829 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-05-03 16:47:49,948 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2021-05-03 16:47:50,254 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-05-03 16:47:50,419 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2021-05-03 16:47:50,751 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 51 [2021-05-03 16:47:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:51,053 INFO L93 Difference]: Finished difference Result 1668 states and 5372 transitions. [2021-05-03 16:47:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 16:47:51,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:47:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:51,057 INFO L225 Difference]: With dead ends: 1668 [2021-05-03 16:47:51,057 INFO L226 Difference]: Without dead ends: 1653 [2021-05-03 16:47:51,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 2798.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 16:47:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-05-03 16:47:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1198. [2021-05-03 16:47:51,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.3333333333333335) internal successors, (3990), 1197 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3990 transitions. [2021-05-03 16:47:51,075 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3990 transitions. Word has length 26 [2021-05-03 16:47:51,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:51,075 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 3990 transitions. [2021-05-03 16:47:51,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:51,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3990 transitions. [2021-05-03 16:47:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:51,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:51,078 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:51,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 16:47:51,287 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:51,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-05-03 16:47:51,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:51,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374334812] [2021-05-03 16:47:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374334812] [2021-05-03 16:47:51,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937584189] [2021-05-03 16:47:51,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:51,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:47:51,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:47:51,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:47:51,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:52,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:52,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-05-03 16:47:52,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:52,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:47:52,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,221 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 28 treesize of output 1 [2021-05-03 16:47:52,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:52,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:47:52,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,267 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:47:52,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:47:52,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:47:52,291 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,303 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,303 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 35 treesize of output 19 [2021-05-03 16:47:52,305 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,321 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 28 treesize of output 16 [2021-05-03 16:47:52,322 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,332 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 26 treesize of output 16 [2021-05-03 16:47:52,333 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,344 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,344 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 28 treesize of output 16 [2021-05-03 16:47:52,345 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,359 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:47:52,360 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,375 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:52,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2021-05-03 16:47:52,377 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,390 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:47:52,392 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,407 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:47:52,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:47:52,410 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:47:52,424 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:52,433 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:47:52,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:47:52,434 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:52,527 INFO L628 ElimStorePlain]: treesize reduction 38, result has 67.2 percent of original size [2021-05-03 16:47:52,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:47:52,530 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:589, output treesize:78 [2021-05-03 16:47:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:52,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:52,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:47:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64395410] [2021-05-03 16:47:52,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:47:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:47:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:47:52,645 INFO L87 Difference]: Start difference. First operand 1198 states and 3990 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:53,212 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-05-03 16:47:53,475 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 16:47:53,652 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:47:54,275 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-05-03 16:47:54,495 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-05-03 16:47:54,834 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-05-03 16:47:54,992 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-05-03 16:47:55,490 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-05-03 16:47:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:47:55,895 INFO L93 Difference]: Finished difference Result 2109 states and 6599 transitions. [2021-05-03 16:47:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 16:47:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:47:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:47:55,901 INFO L225 Difference]: With dead ends: 2109 [2021-05-03 16:47:55,901 INFO L226 Difference]: Without dead ends: 2064 [2021-05-03 16:47:55,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 3020.9ms TimeCoverageRelationStatistics Valid=352, Invalid=2000, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:47:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-05-03 16:47:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1216. [2021-05-03 16:47:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 3.3390946502057615) internal successors, (4057), 1215 states have internal predecessors, (4057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 4057 transitions. [2021-05-03 16:47:55,934 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 4057 transitions. Word has length 26 [2021-05-03 16:47:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:47:55,934 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 4057 transitions. [2021-05-03 16:47:55,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 4057 transitions. [2021-05-03 16:47:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:47:55,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:47:55,937 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:47:56,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:56,153 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:47:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:47:56,153 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-05-03 16:47:56,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:47:56,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29845903] [2021-05-03 16:47:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:47:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:56,571 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 16:47:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:56,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29845903] [2021-05-03 16:47:56,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200607576] [2021-05-03 16:47:56,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:47:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:47:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:47:56,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:47:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:47:57,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:47:57,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:47:57,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:47:57,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:47:57,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:47:57,531 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:47:57,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:47:57,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:47:57,564 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:47:57,579 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:47:57,589 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:47:57,598 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-05-03 16:47:57,610 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,618 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 30 treesize of output 16 [2021-05-03 16:47:57,619 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:47:57,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:47:57,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:47:57,626 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:47:57,648 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:47:57,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:47:57,649 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:47:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:47:57,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:47:57,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:47:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382937027] [2021-05-03 16:47:57,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:47:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:47:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:47:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:47:57,677 INFO L87 Difference]: Start difference. First operand 1216 states and 4057 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:47:59,077 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-05-03 16:47:59,232 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-05-03 16:47:59,593 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 50 [2021-05-03 16:47:59,766 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-05-03 16:48:00,136 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2021-05-03 16:48:00,552 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-05-03 16:48:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:00,835 INFO L93 Difference]: Finished difference Result 1905 states and 6066 transitions. [2021-05-03 16:48:00,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 16:48:00,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:00,839 INFO L225 Difference]: With dead ends: 1905 [2021-05-03 16:48:00,839 INFO L226 Difference]: Without dead ends: 1890 [2021-05-03 16:48:00,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3146.2ms TimeCoverageRelationStatistics Valid=433, Invalid=1919, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 16:48:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-05-03 16:48:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1227. [2021-05-03 16:48:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 3.3450244698205545) internal successors, (4101), 1226 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 4101 transitions. [2021-05-03 16:48:00,860 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 4101 transitions. Word has length 26 [2021-05-03 16:48:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:00,860 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 4101 transitions. [2021-05-03 16:48:00,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 4101 transitions. [2021-05-03 16:48:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:00,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:00,863 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:01,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:01,064 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:01,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-05-03 16:48:01,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:01,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261705473] [2021-05-03 16:48:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:01,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261705473] [2021-05-03 16:48:01,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120701630] [2021-05-03 16:48:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:01,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:48:01,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:48:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:02,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:02,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-05-03 16:48:02,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,330 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:48:02,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 33 [2021-05-03 16:48:02,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,376 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:48:02,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-05-03 16:48:02,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,421 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-05-03 16:48:02,422 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 34 treesize of output 30 [2021-05-03 16:48:02,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,490 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-05-03 16:48:02,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:48:02,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,526 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-05-03 16:48:02,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-05-03 16:48:02,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,551 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:48:02,552 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,573 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:48:02,574 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,598 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:48:02,599 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,633 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-05-03 16:48:02,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-05-03 16:48:02,636 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,659 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-05-03 16:48:02,660 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,693 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-05-03 16:48:02,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:02,695 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,730 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-05-03 16:48:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-05-03 16:48:02,733 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,754 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,755 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 41 treesize of output 1 [2021-05-03 16:48:02,755 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,776 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:48:02,778 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:02,791 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-05-03 16:48:02,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:48:02,792 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:02,935 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 16:48:02,935 INFO L628 ElimStorePlain]: treesize reduction 119, result has 49.8 percent of original size [2021-05-03 16:48:02,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:48:02,938 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:133 [2021-05-03 16:48:03,070 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-05-03 16:48:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:03,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:03,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 16:48:03,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770111002] [2021-05-03 16:48:03,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 16:48:03,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 16:48:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:48:03,132 INFO L87 Difference]: Start difference. First operand 1227 states and 4101 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:03,792 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 16:48:04,792 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-05-03 16:48:05,149 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2021-05-03 16:48:05,283 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-05-03 16:48:05,629 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-05-03 16:48:06,045 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-05-03 16:48:06,295 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:48:06,546 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-05-03 16:48:06,855 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-05-03 16:48:07,019 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-05-03 16:48:07,250 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-05-03 16:48:07,444 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-05-03 16:48:07,593 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-05-03 16:48:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:07,700 INFO L93 Difference]: Finished difference Result 2510 states and 7726 transitions. [2021-05-03 16:48:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 16:48:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:07,705 INFO L225 Difference]: With dead ends: 2510 [2021-05-03 16:48:07,706 INFO L226 Difference]: Without dead ends: 2465 [2021-05-03 16:48:07,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 4515.1ms TimeCoverageRelationStatistics Valid=542, Invalid=3240, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 16:48:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-05-03 16:48:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1399. [2021-05-03 16:48:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 3.3125894134477827) internal successors, (4631), 1398 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 4631 transitions. [2021-05-03 16:48:07,730 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 4631 transitions. Word has length 26 [2021-05-03 16:48:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:07,731 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 4631 transitions. [2021-05-03 16:48:07,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 4631 transitions. [2021-05-03 16:48:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:07,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:07,733 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:07,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-05-03 16:48:07,934 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-05-03 16:48:07,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:07,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389084108] [2021-05-03 16:48:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:08,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389084108] [2021-05-03 16:48:08,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119680207] [2021-05-03 16:48:08,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:08,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:48:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:08,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,904 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:48:08,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,914 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 [2021-05-03 16:48:08,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:48:08,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:08,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:08,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,951 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 21 treesize of output 13 [2021-05-03 16:48:08,952 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,961 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 [2021-05-03 16:48:08,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,970 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 28 treesize of output 16 [2021-05-03 16:48:08,971 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,978 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 13 [2021-05-03 16:48:08,980 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:08,991 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:08,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:08,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:09,000 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 16 [2021-05-03 16:48:09,001 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:09,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:09,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:09,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:09,013 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:09,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:09,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:09,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:09,021 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 [2021-05-03 16:48:09,022 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:09,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:09,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:09,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:09,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:09,053 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:48:09,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:48:09,055 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:48:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:09,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:09,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:48:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461890861] [2021-05-03 16:48:09,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:48:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:48:09,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:48:09,089 INFO L87 Difference]: Start difference. First operand 1399 states and 4631 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:10,181 INFO L93 Difference]: Finished difference Result 1804 states and 5851 transitions. [2021-05-03 16:48:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:48:10,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:10,186 INFO L225 Difference]: With dead ends: 1804 [2021-05-03 16:48:10,186 INFO L226 Difference]: Without dead ends: 1789 [2021-05-03 16:48:10,187 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1278.3ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-05-03 16:48:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2021-05-03 16:48:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1410. [2021-05-03 16:48:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.3101490418736694) internal successors, (4664), 1409 states have internal predecessors, (4664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:10,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4664 transitions. [2021-05-03 16:48:10,219 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4664 transitions. Word has length 26 [2021-05-03 16:48:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:10,220 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 4664 transitions. [2021-05-03 16:48:10,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:10,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4664 transitions. [2021-05-03 16:48:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:10,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:10,223 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:10,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:10,440 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-05-03 16:48:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:10,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609727134] [2021-05-03 16:48:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:10,767 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:48:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609727134] [2021-05-03 16:48:11,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217306899] [2021-05-03 16:48:11,097 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) [2021-05-03 16:48:11,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:48:11,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:48:11,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:11,586 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-05-03 16:48:11,952 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_9, v_prenex_21, v_prenex_13, v_prenex_23, v_prenex_11, v_prenex_17, v_prenex_28, v_prenex_15, v_prenex_26], 3=[v_prenex_19, v_prenex_7]} [2021-05-03 16:48:11,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:11,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-05-03 16:48:11,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:12,453 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 155 [2021-05-03 16:48:12,454 INFO L628 ElimStorePlain]: treesize reduction 117, result has 78.3 percent of original size [2021-05-03 16:48:12,490 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:12,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:48:12,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:12,673 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-05-03 16:48:12,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:12,700 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:48:12,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:12,884 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-05-03 16:48:12,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:12,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:12,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:48:12,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:13,090 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 16:48:13,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:13,091 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-05-03 16:48:13,091 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-05-03 16:48:13,116 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:13,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:48:13,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:13,359 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-05-03 16:48:13,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:13,392 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:48:13,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:13,632 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-05-03 16:48:13,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:13,672 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:13,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:48:13,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:13,875 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-03 16:48:13,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:13,902 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:48:13,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:14,082 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 16:48:14,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:14,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:14,114 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-05-03 16:48:14,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 27 [2021-05-03 16:48:14,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:14,271 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 16:48:14,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:14,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:14,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 28 [2021-05-03 16:48:14,299 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:14,446 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-05-03 16:48:14,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:14,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:48:14,471 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:545, output treesize:487 [2021-05-03 16:48:14,714 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-05-03 16:48:14,926 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 16:48:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:14,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:14,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:48:14,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481253489] [2021-05-03 16:48:14,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:48:14,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:48:14,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:48:14,994 INFO L87 Difference]: Start difference. First operand 1410 states and 4664 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:15,345 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 26 [2021-05-03 16:48:15,774 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:48:16,409 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-05-03 16:48:16,589 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2021-05-03 16:48:16,937 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2021-05-03 16:48:17,327 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-05-03 16:48:17,520 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:48:17,732 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-05-03 16:48:18,198 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-05-03 16:48:18,888 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 83 [2021-05-03 16:48:19,194 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-05-03 16:48:19,501 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-05-03 16:48:20,178 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2021-05-03 16:48:20,548 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 26 [2021-05-03 16:48:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:20,631 INFO L93 Difference]: Finished difference Result 2170 states and 6841 transitions. [2021-05-03 16:48:20,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 16:48:20,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:20,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:20,637 INFO L225 Difference]: With dead ends: 2170 [2021-05-03 16:48:20,637 INFO L226 Difference]: Without dead ends: 2155 [2021-05-03 16:48:20,638 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 6148.5ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:48:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-05-03 16:48:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1429. [2021-05-03 16:48:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.3144257703081235) internal successors, (4733), 1428 states have internal predecessors, (4733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4733 transitions. [2021-05-03 16:48:20,669 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4733 transitions. Word has length 26 [2021-05-03 16:48:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:20,669 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 4733 transitions. [2021-05-03 16:48:20,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:20,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4733 transitions. [2021-05-03 16:48:20,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:20,671 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:20,671 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:20,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-05-03 16:48:20,872 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-05-03 16:48:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:20,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828746365] [2021-05-03 16:48:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:21,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828746365] [2021-05-03 16:48:21,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961526886] [2021-05-03 16:48:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:21,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:48:21,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:21,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:48:21,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:22,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:22,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:22,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:22,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:22,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:22,064 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:48:22,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:22,184 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-05-03 16:48:22,185 INFO L628 ElimStorePlain]: treesize reduction 125, result has 41.3 percent of original size [2021-05-03 16:48:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:22,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:48:22,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:22,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:22,267 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-05-03 16:48:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:22,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:22,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:48:22,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:22,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:22,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:48:22,305 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:265, output treesize:24 [2021-05-03 16:48:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:22,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:22,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:48:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991100103] [2021-05-03 16:48:22,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:48:22,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:48:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:48:22,343 INFO L87 Difference]: Start difference. First operand 1429 states and 4733 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:23,069 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-05-03 16:48:23,378 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-05-03 16:48:23,584 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-05-03 16:48:24,006 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2021-05-03 16:48:24,211 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:48:24,544 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-05-03 16:48:24,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:24,702 INFO L93 Difference]: Finished difference Result 2255 states and 7195 transitions. [2021-05-03 16:48:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:48:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:24,709 INFO L225 Difference]: With dead ends: 2255 [2021-05-03 16:48:24,709 INFO L226 Difference]: Without dead ends: 2225 [2021-05-03 16:48:24,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2589.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:48:24,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-05-03 16:48:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1459. [2021-05-03 16:48:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.324417009602195) internal successors, (4847), 1458 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4847 transitions. [2021-05-03 16:48:24,745 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4847 transitions. Word has length 26 [2021-05-03 16:48:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:24,746 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4847 transitions. [2021-05-03 16:48:24,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4847 transitions. [2021-05-03 16:48:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:24,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:24,749 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:24,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:24,965 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-05-03 16:48:24,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:24,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651848017] [2021-05-03 16:48:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:25,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651848017] [2021-05-03 16:48:25,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254400101] [2021-05-03 16:48:25,318 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:25,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:48:25,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:25,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:48:25,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:48:25,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:25,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:48:25,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:25,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:25,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:25,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:25,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:48:25,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:25,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,914 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 [2021-05-03 16:48:25,915 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:25,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:25,931 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:25,938 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:25,945 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:25,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:25,951 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:25,977 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:48:25,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:48:25,979 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:48:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:26,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:26,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:48:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790718342] [2021-05-03 16:48:26,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:48:26,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:26,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:48:26,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:48:26,017 INFO L87 Difference]: Start difference. First operand 1459 states and 4847 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:26,674 INFO L93 Difference]: Finished difference Result 1832 states and 5996 transitions. [2021-05-03 16:48:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:48:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:26,679 INFO L225 Difference]: With dead ends: 1832 [2021-05-03 16:48:26,679 INFO L226 Difference]: Without dead ends: 1817 [2021-05-03 16:48:26,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 873.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:48:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-05-03 16:48:26,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1468. [2021-05-03 16:48:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.3285616905248805) internal successors, (4883), 1467 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4883 transitions. [2021-05-03 16:48:26,698 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4883 transitions. Word has length 26 [2021-05-03 16:48:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:26,698 INFO L480 AbstractCegarLoop]: Abstraction has 1468 states and 4883 transitions. [2021-05-03 16:48:26,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4883 transitions. [2021-05-03 16:48:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:26,701 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:26,701 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:26,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-05-03 16:48:26,902 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1130404249, now seen corresponding path program 11 times [2021-05-03 16:48:26,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:26,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261171472] [2021-05-03 16:48:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261171472] [2021-05-03 16:48:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712782579] [2021-05-03 16:48:27,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:27,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:48:27,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:48:27,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:27,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:27,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:48:27,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:27,869 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:27,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:48:27,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,078 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:48:28,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,127 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:28,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:48:28,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,158 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:48:28,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,317 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:48:28,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:48:28,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,373 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:28,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:48:28,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,533 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:48:28,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,564 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:48:28,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:48:28,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:28,589 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:48:28,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:48:28,592 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:28,721 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-05-03 16:48:28,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:28,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:48:28,739 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:221 [2021-05-03 16:48:28,876 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-05-03 16:48:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:28,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:28,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:48:28,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27162487] [2021-05-03 16:48:28,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:48:28,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:28,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:48:28,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:48:28,920 INFO L87 Difference]: Start difference. First operand 1468 states and 4883 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:29,268 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-05-03 16:48:29,477 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2021-05-03 16:48:29,827 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2021-05-03 16:48:30,133 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-05-03 16:48:30,325 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-05-03 16:48:30,552 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-05-03 16:48:31,012 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 65 [2021-05-03 16:48:31,203 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-05-03 16:48:31,470 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-05-03 16:48:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:31,653 INFO L93 Difference]: Finished difference Result 2776 states and 8807 transitions. [2021-05-03 16:48:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:48:31,653 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:31,658 INFO L225 Difference]: With dead ends: 2776 [2021-05-03 16:48:31,658 INFO L226 Difference]: Without dead ends: 2746 [2021-05-03 16:48:31,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2863.8ms TimeCoverageRelationStatistics Valid=388, Invalid=1334, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 16:48:31,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-05-03 16:48:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 1460. [2021-05-03 16:48:31,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.3262508567511992) internal successors, (4853), 1459 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4853 transitions. [2021-05-03 16:48:31,684 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4853 transitions. Word has length 26 [2021-05-03 16:48:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:31,684 INFO L480 AbstractCegarLoop]: Abstraction has 1460 states and 4853 transitions. [2021-05-03 16:48:31,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:31,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4853 transitions. [2021-05-03 16:48:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:31,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:31,687 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:31,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:31,887 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 12 times [2021-05-03 16:48:31,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:31,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330301449] [2021-05-03 16:48:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:32,211 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 16:48:32,340 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-03 16:48:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:32,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330301449] [2021-05-03 16:48:32,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484991697] [2021-05-03 16:48:32,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:32,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:48:32,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:48:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:32,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,824 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:48:32,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,863 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:32,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,879 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:32,879 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 [2021-05-03 16:48:32,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:48:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,942 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:32,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:48:32,944 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:32,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,964 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,982 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:32,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:32,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,001 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:33,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:33,003 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,022 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:33,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:33,023 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:33,048 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:33,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,061 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:33,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:33,062 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,075 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:33,076 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 [2021-05-03 16:48:33,076 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:33,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:33,084 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:48:33,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:48:33,086 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:33,173 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-05-03 16:48:33,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:48:33,174 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:689, output treesize:88 [2021-05-03 16:48:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:33,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:33,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:48:33,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111431013] [2021-05-03 16:48:33,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:48:33,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:48:33,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:48:33,274 INFO L87 Difference]: Start difference. First operand 1460 states and 4853 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:33,945 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-05-03 16:48:34,292 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-05-03 16:48:34,442 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-05-03 16:48:34,718 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-05-03 16:48:35,115 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-05-03 16:48:35,334 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-05-03 16:48:35,642 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-03 16:48:35,961 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2021-05-03 16:48:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:36,066 INFO L93 Difference]: Finished difference Result 2128 states and 6867 transitions. [2021-05-03 16:48:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 16:48:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:36,070 INFO L225 Difference]: With dead ends: 2128 [2021-05-03 16:48:36,071 INFO L226 Difference]: Without dead ends: 2098 [2021-05-03 16:48:36,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2927.7ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:48:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-05-03 16:48:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1469. [2021-05-03 16:48:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.332425068119891) internal successors, (4892), 1468 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4892 transitions. [2021-05-03 16:48:36,093 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4892 transitions. Word has length 26 [2021-05-03 16:48:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:36,093 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 4892 transitions. [2021-05-03 16:48:36,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4892 transitions. [2021-05-03 16:48:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:36,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:36,096 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:36,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-05-03 16:48:36,297 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:36,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-05-03 16:48:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:36,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778977768] [2021-05-03 16:48:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778977768] [2021-05-03 16:48:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183050013] [2021-05-03 16:48:36,667 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:36,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:48:36,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:48:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:37,134 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:48:37,460 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-05-03 16:48:37,851 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 83 [2021-05-03 16:48:38,089 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_68], 6=[v_prenex_64, v_prenex_66]} [2021-05-03 16:48:38,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:38,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:38,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:38,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:38,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:48:38,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:38,241 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-05-03 16:48:38,242 INFO L628 ElimStorePlain]: treesize reduction 146, result has 42.7 percent of original size [2021-05-03 16:48:38,242 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-05-03 16:48:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:48:38,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:38,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:38,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:38,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:48:38,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:38,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:38,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:48:38,342 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 16 variables, input treesize:314, output treesize:24 [2021-05-03 16:48:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:38,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:38,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:48:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608380365] [2021-05-03 16:48:38,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:48:38,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:38,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:48:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:48:38,393 INFO L87 Difference]: Start difference. First operand 1469 states and 4892 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:39,024 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-05-03 16:48:39,623 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-05-03 16:48:39,966 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 56 [2021-05-03 16:48:40,238 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:48:40,532 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-05-03 16:48:40,881 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-05-03 16:48:41,180 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-05-03 16:48:41,469 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-05-03 16:48:41,949 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-05-03 16:48:42,125 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-05-03 16:48:43,054 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 79 [2021-05-03 16:48:43,219 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:48:43,410 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 16:48:44,284 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 122 [2021-05-03 16:48:44,689 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 90 [2021-05-03 16:48:45,351 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 85 [2021-05-03 16:48:45,811 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 74 [2021-05-03 16:48:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:46,139 INFO L93 Difference]: Finished difference Result 3830 states and 11792 transitions. [2021-05-03 16:48:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:48:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:46,147 INFO L225 Difference]: With dead ends: 3830 [2021-05-03 16:48:46,147 INFO L226 Difference]: Without dead ends: 3680 [2021-05-03 16:48:46,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 7168.2ms TimeCoverageRelationStatistics Valid=761, Invalid=3661, Unknown=0, NotChecked=0, Total=4422 [2021-05-03 16:48:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-05-03 16:48:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 1538. [2021-05-03 16:48:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 3.3376707872478857) internal successors, (5130), 1537 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 5130 transitions. [2021-05-03 16:48:46,177 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 5130 transitions. Word has length 26 [2021-05-03 16:48:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:46,177 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 5130 transitions. [2021-05-03 16:48:46,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 5130 transitions. [2021-05-03 16:48:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:46,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:46,180 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:46,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-05-03 16:48:46,381 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-05-03 16:48:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:46,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054094428] [2021-05-03 16:48:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:46,753 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-05-03 16:48:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:46,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054094428] [2021-05-03 16:48:46,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854501948] [2021-05-03 16:48:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:46,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:48:46,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:46,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:48:46,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:47,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-05-03 16:48:47,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,685 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 41 treesize of output 16 [2021-05-03 16:48:47,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:47,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:48:47,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:47,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,737 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:48:47,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:48:47,751 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:48:47,766 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:48:47,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:48:47,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,803 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 39 treesize of output 13 [2021-05-03 16:48:47,805 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,817 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 33 treesize of output 13 [2021-05-03 16:48:47,819 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,830 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 34 treesize of output 16 [2021-05-03 16:48:47,831 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:48:47,843 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:47,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:47,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:48:47,850 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:47,881 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:48:47,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:48:47,883 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:48:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:47,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:47,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:48:47,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259239108] [2021-05-03 16:48:47,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:48:47,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:48:47,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:48:47,930 INFO L87 Difference]: Start difference. First operand 1538 states and 5130 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:48,519 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-05-03 16:48:49,079 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-05-03 16:48:49,207 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-05-03 16:48:49,726 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-05-03 16:48:50,076 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-05-03 16:48:50,460 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-05-03 16:48:50,792 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-05-03 16:48:51,444 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-05-03 16:48:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:51,715 INFO L93 Difference]: Finished difference Result 3160 states and 10007 transitions. [2021-05-03 16:48:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:48:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:51,721 INFO L225 Difference]: With dead ends: 3160 [2021-05-03 16:48:51,722 INFO L226 Difference]: Without dead ends: 3073 [2021-05-03 16:48:51,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3657.8ms TimeCoverageRelationStatistics Valid=602, Invalid=2704, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 16:48:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2021-05-03 16:48:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 1556. [2021-05-03 16:48:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1556 states, 1555 states have (on average 3.34983922829582) internal successors, (5209), 1555 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1556 states to 1556 states and 5209 transitions. [2021-05-03 16:48:51,752 INFO L78 Accepts]: Start accepts. Automaton has 1556 states and 5209 transitions. Word has length 26 [2021-05-03 16:48:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:51,752 INFO L480 AbstractCegarLoop]: Abstraction has 1556 states and 5209 transitions. [2021-05-03 16:48:51,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1556 states and 5209 transitions. [2021-05-03 16:48:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:51,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:51,755 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:51,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:51,956 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-05-03 16:48:51,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:51,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600560444] [2021-05-03 16:48:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:52,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600560444] [2021-05-03 16:48:52,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422938803] [2021-05-03 16:48:52,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:52,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:48:52,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:48:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:48:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:52,979 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-05-03 16:48:52,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:48:52,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,026 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-05-03 16:48:53,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-05-03 16:48:53,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,055 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-05-03 16:48:53,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,088 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:48:53,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-05-03 16:48:53,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,120 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-05-03 16:48:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-05-03 16:48:53,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,156 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-05-03 16:48:53,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-05-03 16:48:53,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,183 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-05-03 16:48:53,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:48:53,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-05-03 16:48:53,251 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,282 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-05-03 16:48:53,284 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,304 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-05-03 16:48:53,305 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,324 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,324 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 34 treesize of output 1 [2021-05-03 16:48:53,325 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,344 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-05-03 16:48:53,345 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,376 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-05-03 16:48:53,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-05-03 16:48:53,378 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,398 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:48:53,399 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,419 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-05-03 16:48:53,420 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:53,431 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-05-03 16:48:53,432 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 35 treesize of output 1 [2021-05-03 16:48:53,433 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:53,539 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-05-03 16:48:53,540 INFO L628 ElimStorePlain]: treesize reduction 59, result has 61.2 percent of original size [2021-05-03 16:48:53,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-05-03 16:48:53,541 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:75 [2021-05-03 16:48:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:53,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:53,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-03 16:48:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92704657] [2021-05-03 16:48:53,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:48:53,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:48:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:48:53,642 INFO L87 Difference]: Start difference. First operand 1556 states and 5209 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:54,228 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-05-03 16:48:54,675 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-05-03 16:48:55,372 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-05-03 16:48:55,578 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-05-03 16:48:55,930 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-05-03 16:48:56,508 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 55 [2021-05-03 16:48:57,070 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-03 16:48:57,343 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-05-03 16:48:57,475 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2021-05-03 16:48:57,725 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-05-03 16:48:57,956 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-05-03 16:48:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:48:58,457 INFO L93 Difference]: Finished difference Result 3491 states and 10885 transitions. [2021-05-03 16:48:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 16:48:58,458 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:48:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:48:58,466 INFO L225 Difference]: With dead ends: 3491 [2021-05-03 16:48:58,467 INFO L226 Difference]: Without dead ends: 3403 [2021-05-03 16:48:58,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 4273.0ms TimeCoverageRelationStatistics Valid=805, Invalid=3355, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:48:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-05-03 16:48:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 1566. [2021-05-03 16:48:58,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.3552715654952077) internal successors, (5251), 1565 states have internal predecessors, (5251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5251 transitions. [2021-05-03 16:48:58,517 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5251 transitions. Word has length 26 [2021-05-03 16:48:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:48:58,517 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 5251 transitions. [2021-05-03 16:48:58,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:48:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5251 transitions. [2021-05-03 16:48:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:48:58,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:48:58,521 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:48:58,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-05-03 16:48:58,722 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:48:58,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:48:58,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-05-03 16:48:58,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:48:58,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738110770] [2021-05-03 16:48:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:48:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:59,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738110770] [2021-05-03 16:48:59,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82938483] [2021-05-03 16:48:59,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:48:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:48:59,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:48:59,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:48:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:59,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,609 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 [2021-05-03 16:48:59,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:59,617 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,624 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:48:59,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:48:59,632 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,652 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:48:59,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:59,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:59,673 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:59,682 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:48:59,689 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:59,696 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:48:59,704 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:59,710 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,715 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:48:59,716 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:48:59,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:48:59,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:48:59,721 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:48:59,746 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:48:59,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:48:59,747 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:48:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:48:59,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:48:59,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:48:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744143585] [2021-05-03 16:48:59,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:48:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:48:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:48:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:48:59,777 INFO L87 Difference]: Start difference. First operand 1566 states and 5251 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:00,558 INFO L93 Difference]: Finished difference Result 1955 states and 6431 transitions. [2021-05-03 16:49:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:49:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:00,562 INFO L225 Difference]: With dead ends: 1955 [2021-05-03 16:49:00,562 INFO L226 Difference]: Without dead ends: 1940 [2021-05-03 16:49:00,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1048.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:49:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-05-03 16:49:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1574. [2021-05-03 16:49:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.3515575333757153) internal successors, (5272), 1573 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) [2021-05-03 16:49:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5272 transitions. [2021-05-03 16:49:00,595 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5272 transitions. Word has length 26 [2021-05-03 16:49:00,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:00,595 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 5272 transitions. [2021-05-03 16:49:00,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5272 transitions. [2021-05-03 16:49:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:00,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:00,600 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:00,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-05-03 16:49:00,822 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-05-03 16:49:00,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:00,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832336366] [2021-05-03 16:49:00,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:01,051 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-05-03 16:49:01,180 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-05-03 16:49:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:01,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832336366] [2021-05-03 16:49:01,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214693931] [2021-05-03 16:49:01,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:01,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:49:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:01,865 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:49:02,231 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:49:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:02,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:02,631 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 149 [2021-05-03 16:49:02,632 INFO L628 ElimStorePlain]: treesize reduction 177, result has 69.8 percent of original size [2021-05-03 16:49:02,632 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-05-03 16:49:02,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:49:02,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:02,843 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-05-03 16:49:02,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:02,873 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:02,873 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 28 treesize of output 28 [2021-05-03 16:49:02,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:03,068 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-03 16:49:03,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-05-03 16:49:03,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:03,282 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-05-03 16:49:03,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,327 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:03,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:49:03,329 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:03,517 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-05-03 16:49:03,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,543 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:03,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:49:03,546 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:03,729 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-05-03 16:49:03,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:49:03,757 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:03,934 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-05-03 16:49:03,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:03,959 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:03,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:03,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:04,134 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-03 16:49:04,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:04,165 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:04,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:49:04,167 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:04,341 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-05-03 16:49:04,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:04,367 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:04,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:49:04,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:04,547 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-05-03 16:49:04,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:04,590 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:04,590 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 30 treesize of output 28 [2021-05-03 16:49:04,595 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:04,753 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-05-03 16:49:04,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:04,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-05-03 16:49:04,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-05-03 16:49:04,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 14 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:49:04,767 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 28 variables, input treesize:631, output treesize:486 [2021-05-03 16:49:04,986 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-05-03 16:49:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:05,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:05,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:49:05,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295950069] [2021-05-03 16:49:05,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:49:05,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:49:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:49:05,109 INFO L87 Difference]: Start difference. First operand 1574 states and 5272 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:05,582 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-05-03 16:49:06,043 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-05-03 16:49:06,276 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-05-03 16:49:06,660 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-05-03 16:49:07,008 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-05-03 16:49:07,188 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-03 16:49:07,695 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-05-03 16:49:08,288 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-05-03 16:49:09,161 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2021-05-03 16:49:09,458 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-05-03 16:49:09,685 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-05-03 16:49:10,198 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-05-03 16:49:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:10,390 INFO L93 Difference]: Finished difference Result 2340 states and 7472 transitions. [2021-05-03 16:49:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:49:10,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:10,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:10,396 INFO L225 Difference]: With dead ends: 2340 [2021-05-03 16:49:10,397 INFO L226 Difference]: Without dead ends: 2310 [2021-05-03 16:49:10,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 5595.3ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 16:49:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-05-03 16:49:10,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1562. [2021-05-03 16:49:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.351057014734145) internal successors, (5231), 1561 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5231 transitions. [2021-05-03 16:49:10,431 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5231 transitions. Word has length 26 [2021-05-03 16:49:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:10,431 INFO L480 AbstractCegarLoop]: Abstraction has 1562 states and 5231 transitions. [2021-05-03 16:49:10,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5231 transitions. [2021-05-03 16:49:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:10,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:10,434 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:10,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:10,635 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 15 times [2021-05-03 16:49:10,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:10,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597613652] [2021-05-03 16:49:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:11,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597613652] [2021-05-03 16:49:11,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411323797] [2021-05-03 16:49:11,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:11,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:11,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:11,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:49:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:11,613 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-03 16:49:11,899 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-05-03 16:49:12,258 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-05-03 16:49:12,310 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_104], 2=[A, v_prenex_103]} [2021-05-03 16:49:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:12,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:12,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:12,495 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:49:12,496 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:49:12,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:12,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:12,504 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:12,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:12,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:12,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:12,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:12,570 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:12,625 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-05-03 16:49:12,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:49:12,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-05-03 16:49:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:12,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:12,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-05-03 16:49:12,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785977320] [2021-05-03 16:49:12,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:49:12,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:49:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:49:12,686 INFO L87 Difference]: Start difference. First operand 1562 states and 5231 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:13,819 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-05-03 16:49:14,050 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-05-03 16:49:14,396 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-05-03 16:49:14,887 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-05-03 16:49:15,331 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-05-03 16:49:15,737 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 51 [2021-05-03 16:49:16,442 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 63 [2021-05-03 16:49:16,756 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 51 [2021-05-03 16:49:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:17,079 INFO L93 Difference]: Finished difference Result 2452 states and 7792 transitions. [2021-05-03 16:49:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:49:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:17,084 INFO L225 Difference]: With dead ends: 2452 [2021-05-03 16:49:17,084 INFO L226 Difference]: Without dead ends: 2407 [2021-05-03 16:49:17,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 4602.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 16:49:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-05-03 16:49:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1571. [2021-05-03 16:49:17,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.3528662420382167) internal successors, (5264), 1570 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5264 transitions. [2021-05-03 16:49:17,109 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5264 transitions. Word has length 26 [2021-05-03 16:49:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:17,110 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 5264 transitions. [2021-05-03 16:49:17,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:17,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5264 transitions. [2021-05-03 16:49:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:17,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:17,112 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:17,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-05-03 16:49:17,313 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 16 times [2021-05-03 16:49:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:17,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186627504] [2021-05-03 16:49:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:17,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186627504] [2021-05-03 16:49:17,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027180410] [2021-05-03 16:49:17,692 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:17,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:17,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:17,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:49:17,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:18,073 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:49:18,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:18,299 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:18,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:18,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:18,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:18,326 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 33 treesize of output 27 [2021-05-03 16:49:18,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:18,869 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 124 [2021-05-03 16:49:18,869 INFO L628 ElimStorePlain]: treesize reduction 69, result has 84.4 percent of original size [2021-05-03 16:49:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:18,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:18,891 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 28 treesize of output 24 [2021-05-03 16:49:18,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:19,124 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-05-03 16:49:19,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:19,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:19,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:19,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:19,179 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:19,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:19,181 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:19,522 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 107 [2021-05-03 16:49:19,523 INFO L628 ElimStorePlain]: treesize reduction 20, result has 93.7 percent of original size [2021-05-03 16:49:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:19,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:19,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:49:19,551 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:19,696 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-05-03 16:49:19,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:19,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:19,712 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 21 treesize of output 17 [2021-05-03 16:49:19,714 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:19,861 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-05-03 16:49:19,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:19,878 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:19,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:49:19,880 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,017 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-05-03 16:49:20,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:20,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:20,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:20,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:49:20,039 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:20,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:20,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:20,055 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,271 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-05-03 16:49:20,271 INFO L628 ElimStorePlain]: treesize reduction 24, result has 89.1 percent of original size [2021-05-03 16:49:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:20,285 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:20,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:49:20,288 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:20,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:20,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:49:20,392 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:503, output treesize:152 [2021-05-03 16:49:20,600 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-05-03 16:49:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:20,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:20,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374190467] [2021-05-03 16:49:20,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:20,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:20,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:20,647 INFO L87 Difference]: Start difference. First operand 1571 states and 5264 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:22,033 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-05-03 16:49:22,254 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-05-03 16:49:22,692 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-05-03 16:49:22,855 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 16:49:23,142 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-05-03 16:49:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:23,455 INFO L93 Difference]: Finished difference Result 2684 states and 8631 transitions. [2021-05-03 16:49:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:49:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:23,462 INFO L225 Difference]: With dead ends: 2684 [2021-05-03 16:49:23,463 INFO L226 Difference]: Without dead ends: 2654 [2021-05-03 16:49:23,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 2874.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 16:49:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-05-03 16:49:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 1591. [2021-05-03 16:49:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3660377358490567) internal successors, (5352), 1590 states have internal predecessors, (5352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5352 transitions. [2021-05-03 16:49:23,509 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5352 transitions. Word has length 26 [2021-05-03 16:49:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:23,510 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5352 transitions. [2021-05-03 16:49:23,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5352 transitions. [2021-05-03 16:49:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:23,513 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:23,514 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:23,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:23,729 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 17 times [2021-05-03 16:49:23,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:23,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379529366] [2021-05-03 16:49:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:24,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379529366] [2021-05-03 16:49:24,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295720399] [2021-05-03 16:49:24,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:24,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:24,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:49:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:24,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,679 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:24,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:24,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:24,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:24,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:49:24,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:49:24,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:24,753 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:24,765 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:24,779 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:24,797 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:24,810 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,819 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:24,820 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:49:24,830 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-05-03 16:49:24,842 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:24,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:49:24,847 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:24,876 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 16:49:24,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:49:24,878 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:548, output treesize:15 [2021-05-03 16:49:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:24,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:24,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:49:24,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251405744] [2021-05-03 16:49:24,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:49:24,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:24,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:49:24,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:49:24,918 INFO L87 Difference]: Start difference. First operand 1591 states and 5352 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:25,979 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 16:49:26,154 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-05-03 16:49:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:26,387 INFO L93 Difference]: Finished difference Result 2041 states and 6702 transitions. [2021-05-03 16:49:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:49:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:26,392 INFO L225 Difference]: With dead ends: 2041 [2021-05-03 16:49:26,392 INFO L226 Difference]: Without dead ends: 2020 [2021-05-03 16:49:26,392 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1604.5ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:49:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2021-05-03 16:49:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 1632. [2021-05-03 16:49:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.3623543838136114) internal successors, (5484), 1631 states have internal predecessors, (5484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5484 transitions. [2021-05-03 16:49:26,424 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5484 transitions. Word has length 26 [2021-05-03 16:49:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:26,424 INFO L480 AbstractCegarLoop]: Abstraction has 1632 states and 5484 transitions. [2021-05-03 16:49:26,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5484 transitions. [2021-05-03 16:49:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:26,427 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:26,427 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:26,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1054 [2021-05-03 16:49:26,628 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:26,628 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 18 times [2021-05-03 16:49:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:26,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879733240] [2021-05-03 16:49:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:26,892 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-05-03 16:49:27,005 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2021-05-03 16:49:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879733240] [2021-05-03 16:49:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732049702] [2021-05-03 16:49:27,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:27,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:49:27,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:49:27,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:27,909 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:27,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:27,948 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:27,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:49:27,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:28,173 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-05-03 16:49:28,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:28,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:28,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:49:28,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:28,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:28,236 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:28,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:49:28,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:28,435 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:49:28,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:28,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:28,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:49:28,470 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:28,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:28,500 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:28,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-05-03 16:49:28,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:28,664 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-05-03 16:49:28,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:28,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:28,694 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-05-03 16:49:28,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:28,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:28,719 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:28,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:49:28,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:29,057 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-05-03 16:49:29,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:29,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:49:29,086 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:329, output treesize:227 [2021-05-03 16:49:29,280 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-05-03 16:49:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:29,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:29,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 16:49:29,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673211401] [2021-05-03 16:49:29,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:49:29,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:49:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:49:29,343 INFO L87 Difference]: Start difference. First operand 1632 states and 5484 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:30,739 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-05-03 16:49:31,023 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 16:49:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:31,314 INFO L93 Difference]: Finished difference Result 2113 states and 6944 transitions. [2021-05-03 16:49:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:49:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:31,318 INFO L225 Difference]: With dead ends: 2113 [2021-05-03 16:49:31,319 INFO L226 Difference]: Without dead ends: 2084 [2021-05-03 16:49:31,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2313.3ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:49:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-05-03 16:49:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1629. [2021-05-03 16:49:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.3624078624078626) internal successors, (5474), 1628 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5474 transitions. [2021-05-03 16:49:31,342 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5474 transitions. Word has length 26 [2021-05-03 16:49:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:31,342 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 5474 transitions. [2021-05-03 16:49:31,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5474 transitions. [2021-05-03 16:49:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:31,345 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:31,345 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:31,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1098,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:31,548 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:31,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:31,549 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 19 times [2021-05-03 16:49:31,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:31,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882052686] [2021-05-03 16:49:31,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:31,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882052686] [2021-05-03 16:49:31,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655005961] [2021-05-03 16:49:31,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:31,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:49:31,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:32,313 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:49:32,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:32,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:32,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:32,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:32,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:32,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 13 [2021-05-03 16:49:32,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:32,498 INFO L628 ElimStorePlain]: treesize reduction 116, result has 40.5 percent of original size [2021-05-03 16:49:32,498 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-05-03 16:49:32,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:32,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:32,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:32,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:32,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:32,546 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:32,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:32,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:49:32,583 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:244, output treesize:31 [2021-05-03 16:49:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:32,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:32,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 16:49:32,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323868295] [2021-05-03 16:49:32,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:49:32,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:49:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:49:32,636 INFO L87 Difference]: Start difference. First operand 1629 states and 5474 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:33,096 INFO L93 Difference]: Finished difference Result 1830 states and 6039 transitions. [2021-05-03 16:49:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:49:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:33,100 INFO L225 Difference]: With dead ends: 1830 [2021-05-03 16:49:33,100 INFO L226 Difference]: Without dead ends: 1815 [2021-05-03 16:49:33,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 756.1ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-05-03 16:49:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1635. [2021-05-03 16:49:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.364137086903305) internal successors, (5497), 1634 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5497 transitions. [2021-05-03 16:49:33,122 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5497 transitions. Word has length 26 [2021-05-03 16:49:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:33,122 INFO L480 AbstractCegarLoop]: Abstraction has 1635 states and 5497 transitions. [2021-05-03 16:49:33,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5497 transitions. [2021-05-03 16:49:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:33,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:33,125 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:33,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-05-03 16:49:33,326 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:33,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:33,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1766954001, now seen corresponding path program 20 times [2021-05-03 16:49:33,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:33,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912113651] [2021-05-03 16:49:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:33,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912113651] [2021-05-03 16:49:33,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171611836] [2021-05-03 16:49:33,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:33,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:49:33,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:49:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,920 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:33,920 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 [2021-05-03 16:49:33,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:33,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 24 [2021-05-03 16:49:33,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:33,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-05-03 16:49:33,964 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,984 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 20 [2021-05-03 16:49:33,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:33,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,002 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:49:34,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,021 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,021 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 [2021-05-03 16:49:34,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,036 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:49:34,037 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,056 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:34,057 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 20 [2021-05-03 16:49:34,058 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,078 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-05-03 16:49:34,079 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,094 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:49:34,096 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,158 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:34,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-05-03 16:49:34,160 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:49:34,186 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-05-03 16:49:34,205 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,219 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,219 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 34 treesize of output 16 [2021-05-03 16:49:34,220 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,234 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,234 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 30 treesize of output 16 [2021-05-03 16:49:34,235 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:34,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:34,244 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-03 16:49:34,244 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 [2021-05-03 16:49:34,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:34,379 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-03 16:49:34,380 INFO L628 ElimStorePlain]: treesize reduction 27, result has 79.9 percent of original size [2021-05-03 16:49:34,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:49:34,381 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:697, output treesize:107 [2021-05-03 16:49:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:34,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:34,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-05-03 16:49:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560622604] [2021-05-03 16:49:34,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:49:34,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:49:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:49:34,534 INFO L87 Difference]: Start difference. First operand 1635 states and 5497 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:35,920 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-05-03 16:49:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:36,191 INFO L93 Difference]: Finished difference Result 2330 states and 7580 transitions. [2021-05-03 16:49:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:49:36,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:36,196 INFO L225 Difference]: With dead ends: 2330 [2021-05-03 16:49:36,196 INFO L226 Difference]: Without dead ends: 2284 [2021-05-03 16:49:36,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1566.2ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:49:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-05-03 16:49:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1679. [2021-05-03 16:49:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.365315852205006) internal successors, (5647), 1678 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5647 transitions. [2021-05-03 16:49:36,221 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5647 transitions. Word has length 26 [2021-05-03 16:49:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:36,222 INFO L480 AbstractCegarLoop]: Abstraction has 1679 states and 5647 transitions. [2021-05-03 16:49:36,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5647 transitions. [2021-05-03 16:49:36,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:36,225 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:36,225 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:36,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1149,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:36,426 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:36,426 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 21 times [2021-05-03 16:49:36,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:36,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293449731] [2021-05-03 16:49:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:36,739 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:49:36,866 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-05-03 16:49:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293449731] [2021-05-03 16:49:37,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349695781] [2021-05-03 16:49:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:37,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:49:37,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:37,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:49:37,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:37,565 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:49:37,827 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-05-03 16:49:37,901 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_158], 2=[A, v_prenex_157]} [2021-05-03 16:49:37,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:37,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:49:37,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:38,077 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:49:38,078 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:49:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:38,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:38,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:38,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:38,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:38,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:38,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:38,144 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 30 treesize of output 16 [2021-05-03 16:49:38,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:38,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:38,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:38,211 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-05-03 16:49:38,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:49:38,214 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:25 [2021-05-03 16:49:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:38,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:38,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:38,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711765088] [2021-05-03 16:49:38,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:38,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:38,266 INFO L87 Difference]: Start difference. First operand 1679 states and 5647 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:39,247 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-05-03 16:49:39,722 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-05-03 16:49:40,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:40,032 INFO L93 Difference]: Finished difference Result 2346 states and 7644 transitions. [2021-05-03 16:49:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:49:40,033 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:40,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:40,037 INFO L225 Difference]: With dead ends: 2346 [2021-05-03 16:49:40,038 INFO L226 Difference]: Without dead ends: 2289 [2021-05-03 16:49:40,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2276.6ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-05-03 16:49:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-05-03 16:49:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1714. [2021-05-03 16:49:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.3736135434909515) internal successors, (5779), 1713 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5779 transitions. [2021-05-03 16:49:40,063 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5779 transitions. Word has length 26 [2021-05-03 16:49:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:40,063 INFO L480 AbstractCegarLoop]: Abstraction has 1714 states and 5779 transitions. [2021-05-03 16:49:40,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5779 transitions. [2021-05-03 16:49:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:40,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:40,066 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:40,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:40,267 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 22 times [2021-05-03 16:49:40,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:40,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310785456] [2021-05-03 16:49:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:40,489 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-05-03 16:49:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:40,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310785456] [2021-05-03 16:49:40,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830885624] [2021-05-03 16:49:40,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:40,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:49:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:40,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:49:40,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:41,306 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-05-03 16:49:41,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:41,531 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:41,532 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 35 treesize of output 27 [2021-05-03 16:49:41,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:41,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:41,583 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:41,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:49:41,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:42,137 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 153 [2021-05-03 16:49:42,137 INFO L628 ElimStorePlain]: treesize reduction 153, result has 71.2 percent of original size [2021-05-03 16:49:42,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:42,172 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:42,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:49:42,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:42,416 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-05-03 16:49:42,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:42,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:42,452 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:42,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:49:42,456 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:42,764 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2021-05-03 16:49:42,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:42,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:42,800 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 28 treesize of output 32 [2021-05-03 16:49:42,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:43,403 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-05-03 16:49:43,404 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.4 percent of original size [2021-05-03 16:49:43,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:43,435 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:49:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:49:43,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:43,625 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-05-03 16:49:43,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:43,659 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:49:43,659 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 26 treesize of output 28 [2021-05-03 16:49:43,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:43,845 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-05-03 16:49:43,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:43,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:43,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:43,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:49:43,962 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:43,984 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:49:43,985 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:43,990 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:44,301 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-05-03 16:49:44,302 INFO L628 ElimStorePlain]: treesize reduction 34, result has 88.2 percent of original size [2021-05-03 16:49:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:44,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:44,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:49:44,336 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:44,485 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-05-03 16:49:44,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:44,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:49:44,514 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 24 variables, input treesize:563, output treesize:231 [2021-05-03 16:49:44,691 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-05-03 16:49:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:44,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:44,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:49:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209119705] [2021-05-03 16:49:44,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:44,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:44,749 INFO L87 Difference]: Start difference. First operand 1714 states and 5779 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:45,216 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-05-03 16:49:45,837 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-05-03 16:49:46,145 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-05-03 16:49:46,630 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 16:49:46,850 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 16:49:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:47,095 INFO L93 Difference]: Finished difference Result 2805 states and 9046 transitions. [2021-05-03 16:49:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:49:47,096 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:47,102 INFO L225 Difference]: With dead ends: 2805 [2021-05-03 16:49:47,102 INFO L226 Difference]: Without dead ends: 2750 [2021-05-03 16:49:47,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2656.2ms TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:49:47,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-05-03 16:49:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1711. [2021-05-03 16:49:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.374269005847953) internal successors, (5770), 1710 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5770 transitions. [2021-05-03 16:49:47,145 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5770 transitions. Word has length 26 [2021-05-03 16:49:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:47,145 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5770 transitions. [2021-05-03 16:49:47,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:47,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5770 transitions. [2021-05-03 16:49:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:47,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:47,165 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:47,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1185,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:47,365 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 23 times [2021-05-03 16:49:47,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:47,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213511143] [2021-05-03 16:49:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213511143] [2021-05-03 16:49:47,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733036876] [2021-05-03 16:49:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:47,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:49:47,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:49:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:48,468 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-03 16:49:48,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:48,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-05-03 16:49:48,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:48,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:48,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:49:48,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,275 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-05-03 16:49:49,276 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-05-03 16:49:49,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,299 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-05-03 16:49:49,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:49,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-05-03 16:49:49,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,532 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-05-03 16:49:49,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:49,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:49,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:49,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,577 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:49,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:49:49,579 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,774 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-05-03 16:49:49,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:49,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:49:49,804 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:49,827 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:49,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-05-03 16:49:49,830 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:50,012 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:49:50,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:50,037 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-03 16:49:50,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 20 [2021-05-03 16:49:50,040 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:50,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:50,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:50,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:49:50,072 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:50,263 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-05-03 16:49:50,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:50,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-05-03 16:49:50,274 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 10 variables, input treesize:391, output treesize:176 [2021-05-03 16:49:50,475 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-05-03 16:49:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:50,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:50,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:49:50,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030737455] [2021-05-03 16:49:50,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:49:50,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:49:50,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:49:50,540 INFO L87 Difference]: Start difference. First operand 1711 states and 5770 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:50,704 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2021-05-03 16:49:51,318 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-05-03 16:49:52,026 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-05-03 16:49:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:52,369 INFO L93 Difference]: Finished difference Result 2323 states and 7626 transitions. [2021-05-03 16:49:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:49:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:52,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:52,374 INFO L225 Difference]: With dead ends: 2323 [2021-05-03 16:49:52,374 INFO L226 Difference]: Without dead ends: 2277 [2021-05-03 16:49:52,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2304.8ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:49:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-05-03 16:49:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1711. [2021-05-03 16:49:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1710 states have (on average 3.374269005847953) internal successors, (5770), 1710 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:52,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 5770 transitions. [2021-05-03 16:49:52,400 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 5770 transitions. Word has length 26 [2021-05-03 16:49:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:52,400 INFO L480 AbstractCegarLoop]: Abstraction has 1711 states and 5770 transitions. [2021-05-03 16:49:52,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:52,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 5770 transitions. [2021-05-03 16:49:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:52,402 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:52,402 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:52,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-05-03 16:49:52,603 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -39476015, now seen corresponding path program 42 times [2021-05-03 16:49:52,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:52,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690636763] [2021-05-03 16:49:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:53,117 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-05-03 16:49:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:53,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690636763] [2021-05-03 16:49:53,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722837348] [2021-05-03 16:49:53,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:53,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:49:53,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:49:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:49:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,033 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 32 treesize of output 16 [2021-05-03 16:49:54,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,043 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 28 treesize of output 13 [2021-05-03 16:49:54,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-05-03 16:49:54,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:54,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,084 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 39 treesize of output 13 [2021-05-03 16:49:54,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-05-03 16:49:54,102 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:49:54,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,124 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 35 treesize of output 19 [2021-05-03 16:49:54,125 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,135 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 28 treesize of output 13 [2021-05-03 16:49:54,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-05-03 16:49:54,149 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-05-03 16:49:54,160 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-05-03 16:49:54,171 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-05-03 16:49:54,183 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-05-03 16:49:54,195 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:54,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:54,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-05-03 16:49:54,201 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:54,229 INFO L628 ElimStorePlain]: treesize reduction 15, result has 58.3 percent of original size [2021-05-03 16:49:54,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:49:54,231 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:637, output treesize:15 [2021-05-03 16:49:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:54,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:54,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 16:49:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214431221] [2021-05-03 16:49:54,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:49:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:49:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:49:54,264 INFO L87 Difference]: Start difference. First operand 1711 states and 5770 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:55,658 INFO L93 Difference]: Finished difference Result 2167 states and 7120 transitions. [2021-05-03 16:49:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:49:55,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:55,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:55,664 INFO L225 Difference]: With dead ends: 2167 [2021-05-03 16:49:55,664 INFO L226 Difference]: Without dead ends: 2141 [2021-05-03 16:49:55,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1542.4ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:49:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-05-03 16:49:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1715. [2021-05-03 16:49:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1714 states have (on average 3.372228704784131) internal successors, (5780), 1714 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 5780 transitions. [2021-05-03 16:49:55,695 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 5780 transitions. Word has length 26 [2021-05-03 16:49:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:55,695 INFO L480 AbstractCegarLoop]: Abstraction has 1715 states and 5780 transitions. [2021-05-03 16:49:55,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 5780 transitions. [2021-05-03 16:49:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:55,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:55,698 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:55,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1261 [2021-05-03 16:49:55,899 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:55,899 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-05-03 16:49:55,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:55,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900484445] [2021-05-03 16:49:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:56,120 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 16:49:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:56,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900484445] [2021-05-03 16:49:56,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286071396] [2021-05-03 16:49:56,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:49:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:49:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 16:49:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:49:56,824 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-05-03 16:49:56,908 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_191, v_prenex_193], 5=[A, v_prenex_189]} [2021-05-03 16:49:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:49:56,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:56,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:56,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-05-03 16:49:56,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:57,049 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 16:49:57,050 INFO L628 ElimStorePlain]: treesize reduction 128, result has 41.0 percent of original size [2021-05-03 16:49:57,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_193 vanished before elimination [2021-05-03 16:49:57,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:57,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:57,055 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 29 treesize of output 13 [2021-05-03 16:49:57,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:57,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:57,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:49:57,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:49:57,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-05-03 16:49:57,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:49:57,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:49:57,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:49:57,136 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:270, output treesize:31 [2021-05-03 16:49:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:49:57,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:49:57,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 16:49:57,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892353467] [2021-05-03 16:49:57,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 16:49:57,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:49:57,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 16:49:57,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:49:57,195 INFO L87 Difference]: Start difference. First operand 1715 states and 5780 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:59,316 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 16:49:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:49:59,625 INFO L93 Difference]: Finished difference Result 2392 states and 7841 transitions. [2021-05-03 16:49:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 16:49:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:49:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:49:59,630 INFO L225 Difference]: With dead ends: 2392 [2021-05-03 16:49:59,630 INFO L226 Difference]: Without dead ends: 2377 [2021-05-03 16:49:59,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2594.7ms TimeCoverageRelationStatistics Valid=403, Invalid=1667, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 16:49:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-05-03 16:49:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 1721. [2021-05-03 16:49:59,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.3738372093023257) internal successors, (5803), 1720 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5803 transitions. [2021-05-03 16:49:59,663 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5803 transitions. Word has length 26 [2021-05-03 16:49:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:49:59,663 INFO L480 AbstractCegarLoop]: Abstraction has 1721 states and 5803 transitions. [2021-05-03 16:49:59,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:49:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5803 transitions. [2021-05-03 16:49:59,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:49:59,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:49:59,666 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:49:59,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-05-03 16:49:59,887 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:49:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:49:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 24 times [2021-05-03 16:49:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:49:59,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65245958] [2021-05-03 16:49:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:49:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:00,132 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-05-03 16:50:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:00,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65245958] [2021-05-03 16:50:00,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256465879] [2021-05-03 16:50:00,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:00,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:50:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 16:50:00,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:00,773 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-03 16:50:01,030 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-05-03 16:50:01,789 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:01,789 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 19 [2021-05-03 16:50:01,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:01,838 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:01,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-05-03 16:50:01,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,471 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 128 [2021-05-03 16:50:02,471 INFO L628 ElimStorePlain]: treesize reduction 72, result has 84.9 percent of original size [2021-05-03 16:50:02,508 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:02,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:50:02,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:02,773 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-05-03 16:50:02,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:02,851 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:02,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:50:02,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:03,094 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-05-03 16:50:03,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:03,124 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-05-03 16:50:03,127 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:03,391 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-05-03 16:50:03,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:03,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:03,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:50:03,430 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:03,450 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:03,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:03,453 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:03,895 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-05-03 16:50:03,896 INFO L628 ElimStorePlain]: treesize reduction 23, result has 93.3 percent of original size [2021-05-03 16:50:03,928 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:03,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:50:03,937 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:04,186 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-05-03 16:50:04,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:04,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:04,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-05-03 16:50:04,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:04,474 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-05-03 16:50:04,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:04,535 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 24 [2021-05-03 16:50:04,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:04,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:04,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-05-03 16:50:04,573 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:04,978 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2021-05-03 16:50:04,979 INFO L628 ElimStorePlain]: treesize reduction 31, result has 88.7 percent of original size [2021-05-03 16:50:04,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-05-03 16:50:05,000 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 16 variables, input treesize:539, output treesize:404 [2021-05-03 16:50:05,338 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-05-03 16:50:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:05,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:05,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-03 16:50:05,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811635519] [2021-05-03 16:50:05,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:50:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:50:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:50:05,509 INFO L87 Difference]: Start difference. First operand 1721 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:05,750 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 25 [2021-05-03 16:50:06,117 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 16:50:06,414 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-05-03 16:50:06,717 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-05-03 16:50:06,993 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 47 [2021-05-03 16:50:07,235 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-05-03 16:50:07,459 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-05-03 16:50:07,736 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-05-03 16:50:08,061 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-03 16:50:08,405 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-05-03 16:50:08,806 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-05-03 16:50:09,236 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-05-03 16:50:09,574 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-05-03 16:50:10,350 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2021-05-03 16:50:10,844 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2021-05-03 16:50:11,731 WARN L205 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2021-05-03 16:50:12,809 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 130 DAG size of output: 93 [2021-05-03 16:50:14,006 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-05-03 16:50:14,490 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-05-03 16:50:15,867 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2021-05-03 16:50:16,211 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2021-05-03 16:50:16,505 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2021-05-03 16:50:16,673 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-05-03 16:50:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:16,838 INFO L93 Difference]: Finished difference Result 2749 states and 8697 transitions. [2021-05-03 16:50:16,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 16:50:16,839 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:16,845 INFO L225 Difference]: With dead ends: 2749 [2021-05-03 16:50:16,845 INFO L226 Difference]: Without dead ends: 2685 [2021-05-03 16:50:16,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 11163.6ms TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:50:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-05-03 16:50:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1753. [2021-05-03 16:50:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.384132420091324) internal successors, (5929), 1752 states have internal predecessors, (5929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5929 transitions. [2021-05-03 16:50:16,881 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5929 transitions. Word has length 26 [2021-05-03 16:50:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:16,881 INFO L480 AbstractCegarLoop]: Abstraction has 1753 states and 5929 transitions. [2021-05-03 16:50:16,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5929 transitions. [2021-05-03 16:50:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:16,884 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:16,884 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:17,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1389,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:17,085 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1125767463, now seen corresponding path program 25 times [2021-05-03 16:50:17,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:17,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874581636] [2021-05-03 16:50:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:17,374 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-03 16:50:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:17,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874581636] [2021-05-03 16:50:17,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303995934] [2021-05-03 16:50:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:50:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:18,117 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-05-03 16:50:18,399 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2021-05-03 16:50:18,497 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_232], 2=[A, v_prenex_231]} [2021-05-03 16:50:18,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 16:50:18,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,758 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 16:50:18,758 INFO L628 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2021-05-03 16:50:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:18,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-05-03 16:50:18,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:50:18,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,898 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 16:50:18,899 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.5 percent of original size [2021-05-03 16:50:18,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:50:18,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 16:50:18,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-05-03 16:50:18,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:18,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:18,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-03 16:50:18,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:179, output treesize:32 [2021-05-03 16:50:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:19,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:19,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 16:50:19,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253834005] [2021-05-03 16:50:19,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 16:50:19,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 16:50:19,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-05-03 16:50:19,038 INFO L87 Difference]: Start difference. First operand 1753 states and 5929 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:19,658 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 16:50:19,949 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 16:50:20,520 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-05-03 16:50:20,990 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-05-03 16:50:21,580 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-05-03 16:50:21,820 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-05-03 16:50:22,309 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-05-03 16:50:22,895 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-05-03 16:50:23,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:23,451 INFO L93 Difference]: Finished difference Result 2673 states and 8553 transitions. [2021-05-03 16:50:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 16:50:23,453 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:50:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:23,458 INFO L225 Difference]: With dead ends: 2673 [2021-05-03 16:50:23,459 INFO L226 Difference]: Without dead ends: 2628 [2021-05-03 16:50:23,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 4042.5ms TimeCoverageRelationStatistics Valid=273, Invalid=987, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:50:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-05-03 16:50:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1772. [2021-05-03 16:50:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.3969508752117448) internal successors, (6016), 1771 states have internal predecessors, (6016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6016 transitions. [2021-05-03 16:50:23,512 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6016 transitions. Word has length 26 [2021-05-03 16:50:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:23,512 INFO L480 AbstractCegarLoop]: Abstraction has 1772 states and 6016 transitions. [2021-05-03 16:50:23,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6016 transitions. [2021-05-03 16:50:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:50:23,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:50:23,516 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:50:23,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1467 [2021-05-03 16:50:23,729 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:50:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:50:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 26 times [2021-05-03 16:50:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:50:23,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138284958] [2021-05-03 16:50:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:50:23,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:50:23,984 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2021-05-03 16:50:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:24,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138284958] [2021-05-03 16:50:24,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720871798] [2021-05-03 16:50:24,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:24,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:50:24,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:50:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 16:50:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:50:24,654 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:24,654 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 33 treesize of output 19 [2021-05-03 16:50:24,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,674 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:24,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:24,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,722 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:24,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:50:24,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,777 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-05-03 16:50:24,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:24,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 35 [2021-05-03 16:50:24,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,854 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:24,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 16 [2021-05-03 16:50:24,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,891 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-05-03 16:50:24,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-05-03 16:50:24,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,923 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:24,923 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 35 treesize of output 1 [2021-05-03 16:50:24,925 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,949 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:24,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2021-05-03 16:50:24,951 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:24,999 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:24,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-05-03 16:50:25,008 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,034 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:25,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 1 [2021-05-03 16:50:25,036 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,057 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:25,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:25,059 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,105 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-05-03 16:50:25,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2021-05-03 16:50:25,108 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,131 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 16 [2021-05-03 16:50:25,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:50:25,170 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 16 treesize of output 26 [2021-05-03 16:50:25,184 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,201 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-05-03 16:50:25,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-05-03 16:50:25,203 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-03 16:50:25,526 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-05-03 16:50:25,527 INFO L628 ElimStorePlain]: treesize reduction 60, result has 75.1 percent of original size [2021-05-03 16:50:25,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-05-03 16:50:25,530 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:797, output treesize:181 [2021-05-03 16:50:25,705 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-05-03 16:50:25,881 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-03 16:50:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:50:26,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:50:26,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-05-03 16:50:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822128409] [2021-05-03 16:50:26,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:50:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:50:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:50:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:50:26,085 INFO L87 Difference]: Start difference. First operand 1772 states and 6016 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) [2021-05-03 16:50:26,362 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2021-05-03 16:50:26,669 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-05-03 16:50:26,895 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-03 16:50:27,341 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-05-03 16:50:27,588 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-05-03 16:50:27,710 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-05-03 16:50:28,035 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 16:50:28,490 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 16:50:29,102 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-05-03 16:50:29,558 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-05-03 16:50:29,992 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-05-03 16:50:30,434 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-03 16:50:30,931 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-05-03 16:50:31,114 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-05-03 16:50:31,378 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2021-05-03 16:50:31,614 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-05-03 16:50:32,017 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-05-03 16:50:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:50:32,212 INFO L93 Difference]: Finished difference Result 3469 states and 10718 transitions. [2021-05-03 16:50:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 16:50:32,214 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 [2021-05-03 16:50:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:50:32,214 INFO L225 Difference]: With dead ends: 3469 [2021-05-03 16:50:32,214 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 16:50:32,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 5855.7ms TimeCoverageRelationStatistics Valid=532, Invalid=2120, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 16:50:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 16:50:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 16:50:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:50:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 16:50:32,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-05-03 16:50:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:50:32,215 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 16:50:32,215 INFO L481 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) [2021-05-03 16:50:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 16:50:32,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 16:50:32,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1479,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:50:32,421 INFO L202 PluginConnector]: Adding new model min-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 04:50:32 BasicIcfg [2021-05-03 16:50:32,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 16:50:32,422 INFO L168 Benchmark]: Toolchain (without parser) took 204403.54 ms. Allocated memory was 362.8 MB in the beginning and 721.4 MB in the end (delta: 358.6 MB). Free memory was 342.1 MB in the beginning and 283.8 MB in the end (delta: 58.2 MB). Peak memory consumption was 417.3 MB. Max. memory is 16.0 GB. [2021-05-03 16:50:32,422 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.2 MB in the beginning and 343.1 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:50:32,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.40 ms. Allocated memory is still 362.8 MB. Free memory was 342.0 MB in the beginning and 340.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:50:32,422 INFO L168 Benchmark]: Boogie Preprocessor took 18.21 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 16:50:32,422 INFO L168 Benchmark]: RCFGBuilder took 236.48 ms. Allocated memory is still 362.8 MB. Free memory was 339.4 MB in the beginning and 326.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 16:50:32,422 INFO L168 Benchmark]: TraceAbstraction took 204113.87 ms. Allocated memory was 362.8 MB in the beginning and 721.4 MB in the end (delta: 358.6 MB). Free memory was 326.2 MB in the beginning and 283.8 MB in the end (delta: 42.4 MB). Peak memory consumption was 402.6 MB. Max. memory is 16.0 GB. [2021-05-03 16:50:32,423 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 0.14 ms. Allocated memory is still 362.8 MB. Free memory was 343.2 MB in the beginning and 343.1 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.40 ms. Allocated memory is still 362.8 MB. Free memory was 342.0 MB in the beginning and 340.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.21 ms. Allocated memory is still 362.8 MB. Free memory was 340.5 MB in the beginning and 339.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 236.48 ms. Allocated memory is still 362.8 MB. Free memory was 339.4 MB in the beginning and 326.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 204113.87 ms. Allocated memory was 362.8 MB in the beginning and 721.4 MB in the end (delta: 358.6 MB). Free memory was 326.2 MB in the beginning and 283.8 MB in the end (delta: 42.4 MB). Peak memory consumption was 402.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 204005.7ms, OverallIterations: 72, TraceHistogramMax: 2, EmptinessCheckTime: 207.9ms, AutomataDifference: 113094.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2825 SDtfs, 15348 SDslu, 20185 SDs, 0 SdLazy, 34825 SolverSat, 2513 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22449.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3670 GetRequests, 1325 SyntacticMatches, 69 SemanticMatches, 2276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25970 ImplicationChecksByTransitivity, 110939.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1772occurred in iteration=71, InterpolantAutomatonStates: 1876, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1897.8ms AutomataMinimizationTime, 72 MinimizatonAttempts, 54942 StatesRemovedByMinimization, 71 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 299.7ms SsaConstructionTime, 1066.2ms SatisfiabilityAnalysisTime, 71292.3ms InterpolantComputationTime, 3478 NumberOfCodeBlocks, 3478 NumberOfCodeBlocksAsserted, 218 NumberOfCheckSat, 3337 ConstructedInterpolants, 57 QuantifiedInterpolants, 67185 SizeOfPredicates, 316 NumberOfNonLiveVariables, 4344 ConjunctsInSsa, 1087 ConjunctsInUnsatCore, 141 InterpolantComputations, 3 PerfectInterpolantSequences, 107/750 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 proved your program to be correct! Received shutdown request...